51731344 has 20 divisors (see below), whose sum is σ = 114548224. Its totient is φ = 22170528.

The previous prime is 51731341. The next prime is 51731353. The reversal of 51731344 is 44313715.

It is a super-2 number, since 2×51731344² = 5352263904092672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (51731341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230832 + ... + 231055.

Almost surely, 2^51731344 is an apocalyptic number.

It is an amenable number.

51731344 is an abundant number, since it is smaller than the sum of its proper divisors (62816880).

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

51731344 is a wasteful number, since it uses less digits than its factorization.

51731344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461902 (or 461896 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 51731344 is about 7192.4504864476. The cubic root of 51731344 is about 372.6072096556.

The spelling of 51731344 in words is "fifty-one million, seven hundred thirty-one thousand, three hundred forty-four".