51031396 has 12 divisors (see below), whose sum is σ = 96174652. Its totient is φ = 23552928.

The previous prime is 51031391. The next prime is 51031423. The reversal of 51031396 is 69313015.

It can be written as a sum of positive squares in 2 ways, for example, as 5953600 + 45077796 = 2440^2 + 6714^2 .

It is not an unprimeable number, because it can be changed into a prime (51031391) 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, 490635 + ... + 490738.

Almost surely, 2^51031396 is an apocalyptic number.

It is an amenable number.

51031396 is a deficient number, since it is larger than the sum of its proper divisors (45143256).

51031396 is a wasteful number, since it uses less digits than its factorization.

51031396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981390 (or 981388 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 51031396 is about 7143.6262500218. The cubic root of 51031396 is about 370.9190592648.

The spelling of 51031396 in words is "fifty-one million, thirty-one thousand, three hundred ninety-six".