51263931 has 16 divisors (see below), whose sum is σ = 69341184. Its totient is φ = 33685344.

The previous prime is 51263923. The next prime is 51263939. The reversal of 51263931 is 13936215.

It is an interprime number because it is at equal distance from previous prime (51263923) and next prime (51263939).

It is not a de Polignac number, because 51263931 - 2³ = 51263923 is a prime.

It is a super-2 number, since 2×51263931² = 5255981243145522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51263939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74716 + ... + 75398.

It is an arithmetic number, because the mean of its divisors is an integer number (4333824).

Almost surely, 2^51263931 is an apocalyptic number.

51263931 is a deficient number, since it is larger than the sum of its proper divisors (18077253).

51263931 is a wasteful number, since it uses less digits than its factorization.

51263931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010.

The product of its digits is 4860, while the sum is 30.

The square root of 51263931 is about 7159.8834487721. The cubic root of 51263931 is about 371.4815952267.

The spelling of 51263931 in words is "fifty-one million, two hundred sixty-three thousand, nine hundred thirty-one".