511996931 has 4 divisors (see below), whose sum is σ = 512042664. Its totient is φ = 511951200.

The previous prime is 511996921. The next prime is 511996963. The reversal of 511996931 is 139699115.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511996931 is a prime.

It is a super-2 number, since 2×511996931² = 524281714706837522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511996921) 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, 6491 + ... + 32651.

It is an arithmetic number, because the mean of its divisors is an integer number (128010666).

Almost surely, 2^511996931 is an apocalyptic number.

511996931 is a deficient number, since it is larger than the sum of its proper divisors (45733).

511996931 is a wasteful number, since it uses less digits than its factorization.

511996931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45732.

The product of its digits is 65610, while the sum is 44.

The square root of 511996931 is about 22627.3491819082. The cubic root of 511996931 is about 799.9984015593.

The spelling of 511996931 in words is "five hundred eleven million, nine hundred ninety-six thousand, nine hundred thirty-one".