51133206256 has 40 divisors (see below), whose sum is σ = 109068577200. Its totient is φ = 23029125120.

The previous prime is 51133206253. The next prime is 51133206283. The reversal of 51133206256 is 65260233115.

It is a super-2 number, since 2×51133206256² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51133206251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1313521 + ... + 1351888.

It is an arithmetic number, because the mean of its divisors is an integer number (2726714430).

Almost surely, 2^51133206256 is an apocalyptic number.

It is an amenable number.

51133206256 is an abundant number, since it is smaller than the sum of its proper divisors (57935370944).

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

51133206256 is a wasteful number, since it uses less digits than its factorization.

51133206256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665537 (or 2665531 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 51133206256 in words is "fifty-one billion, one hundred thirty-three million, two hundred six thousand, two hundred fifty-six".