51157744 has 20 divisors (see below), whose sum is σ = 108129240. Its totient is φ = 23253440.

The previous prime is 51157739. The next prime is 51157751. The reversal of 51157744 is 44775115.

It is a super-2 number, since 2×51157744² = 5234229542339072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145159 + ... + 145510.

It is an arithmetic number, because the mean of its divisors is an integer number (5406462).

Almost surely, 2^51157744 is an apocalyptic number.

It is an amenable number.

51157744 is an abundant number, since it is smaller than the sum of its proper divisors (56971496).

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

51157744 is a wasteful number, since it uses less digits than its factorization.

51157744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290688 (or 290682 counting only the distinct ones).

The product of its digits is 19600, while the sum is 34.

The square root of 51157744 is about 7152.4641907527. The cubic root of 51157744 is about 371.2249249390.

The spelling of 51157744 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred forty-four".