51772356 has 72 divisors (see below), whose sum is σ = 141033984. Its totient is φ = 15966720.

The previous prime is 51772351. The next prime is 51772363. The reversal of 51772356 is 65327715.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51772356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51772351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24660 + ... + 26676.

Almost surely, 2^51772356 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 51772356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70516992).

51772356 is an abundant number, since it is smaller than the sum of its proper divisors (89261628).

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

51772356 is a wasteful number, since it uses less digits than its factorization.

51772356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2076 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 51772356 is about 7195.3009666031. The cubic root of 51772356 is about 372.7056498480.

The spelling of 51772356 in words is "fifty-one million, seven hundred seventy-two thousand, three hundred fifty-six".