51440344 has 16 divisors (see below), whose sum is σ = 96795720. Its totient is φ = 25628160.

The previous prime is 51440327. The next prime is 51440359. The reversal of 51440344 is 44304415.

It is a super-2 number, since 2×51440344² = 5292217981676672, 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, 9097 + ... + 13624.

Almost surely, 2^51440344 is an apocalyptic number.

It is an amenable number.

51440344 is a deficient number, since it is larger than the sum of its proper divisors (45355376).

51440344 is a wasteful number, since it uses less digits than its factorization.

51440344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23010 (or 23006 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 51440344 is about 7172.1924123660. The cubic root of 51440344 is about 371.9072301138.

Adding to 51440344 its reverse (44304415), we get a palindrome (95744759).

The spelling of 51440344 in words is "fifty-one million, four hundred forty thousand, three hundred forty-four".