51731396 has 12 divisors (see below), whose sum is σ = 92456448. Its totient is φ = 25315272.

The previous prime is 51731387. The next prime is 51731411. The reversal of 51731396 is 69313715.

51731396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51731396² = 5352274664217632, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 137396 + ... + 137771.

It is an arithmetic number, because the mean of its divisors is an integer number (7704704).

Almost surely, 2^51731396 is an apocalyptic number.

It is an amenable number.

51731396 is a deficient number, since it is larger than the sum of its proper divisors (40725052).

51731396 is a wasteful number, since it uses less digits than its factorization.

51731396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275218 (or 275216 counting only the distinct ones).

The product of its digits is 17010, while the sum is 35.

The square root of 51731396 is about 7192.4541013482. The cubic root of 51731396 is about 372.6073345030.

It can be divided in two parts, 517 and 31396, that added together give a palindrome (31913).

The spelling of 51731396 in words is "fifty-one million, seven hundred thirty-one thousand, three hundred ninety-six".