51496931 has 4 divisors (see below), whose sum is σ = 53735952. Its totient is φ = 49257912.

The previous prime is 51496919. The next prime is 51496969. The reversal of 51496931 is 13969415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13969415 = 5 ⋅2793883.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51496931 is a prime.

It is a super-2 number, since 2×51496931² = 5303867804837522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51496031) 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, 1119476 + ... + 1119521.

It is an arithmetic number, because the mean of its divisors is an integer number (13433988).

Almost surely, 2^51496931 is an apocalyptic number.

51496931 is a deficient number, since it is larger than the sum of its proper divisors (2239021).

51496931 is a wasteful number, since it uses less digits than its factorization.

51496931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239020.

The product of its digits is 29160, while the sum is 38.

The square root of 51496931 is about 7176.1362166559. The cubic root of 51496931 is about 372.0435524412.

The spelling of 51496931 in words is "fifty-one million, four hundred ninety-six thousand, nine hundred thirty-one".