51033520836 has 81 divisors (see below), whose sum is σ = 134936444461. Its totient is φ = 16261617504.

The previous prime is 51033520831. The next prime is 51033520841. The reversal of 51033520836 is 63802533015.

The square root of 51033520836 is 225906.

It is a perfect power (a square), and thus also a powerful number.

51033520836 is a `hidden beast` number, since 51 + 0 + 3 + 3 + 520 + 83 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (51033520831) and next prime (51033520841).

It can be written as a sum of positive squares in only one way, i.e., 1546848900 + 49486671936 = 39330^2 + 222456^2 .

It is a super-2 number, since 2×51033520836² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51033520836.

It is not an unprimeable number, because it can be changed into a prime (51033520831) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31174210 + ... + 31175846.

Almost surely, 2^51033520836 is an apocalyptic number.

51033520836 is the 225906-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51033520836

51033520836 is an abundant number, since it is smaller than the sum of its proper divisors (83902923625).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51033520836 is a wasteful number, since it uses less digits than its factorization.

51033520836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330 (or 1665 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Multiplying 51033520836 by its sum of digits (36), we get a square (1837206750096 = 1355436²).

51033520836 divided by its sum of digits (36) gives a square (1417597801 = 37651²).

The spelling of 51033520836 in words is "fifty-one billion, thirty-three million, five hundred twenty thousand, eight hundred thirty-six".