51172836 has 72 divisors (see below), whose sum is σ = 141392832. Its totient is φ = 14308800.

The previous prime is 51172829. The next prime is 51172897. The reversal of 51172836 is 63827115.

51172836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 51172797 and 51172806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17521 + ... + 20231.

Almost surely, 2^51172836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51172836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70696416).

51172836 is an abundant number, since it is smaller than the sum of its proper divisors (90219996).

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

51172836 is a wasteful number, since it uses less digits than its factorization.

51172836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753 (or 2740 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 51172836 is about 7153.5191339648. The cubic root of 51172836 is about 371.2614262601.

The spelling of 51172836 in words is "fifty-one million, one hundred seventy-two thousand, eight hundred thirty-six".