51895931 has 2 divisors, whose sum is σ = 51895932. Its totient is φ = 51895930.

The previous prime is 51895913. The next prime is 51895937. The reversal of 51895931 is 13959815.

Together with previous prime (51895913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51895931 - 2¹⁰ = 51894907 is a prime.

It is a super-2 number, since 2×51895931² = 5386375308713522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51895937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25947965 + 25947966.

It is an arithmetic number, because the mean of its divisors is an integer number (25947966).

Almost surely, 2^51895931 is an apocalyptic number.

51895931 is a deficient number, since it is larger than the sum of its proper divisors (1).

51895931 is an equidigital number, since it uses as much as digits as its factorization.

51895931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 41.

The square root of 51895931 is about 7203.8830501334. The cubic root of 51895931 is about 373.0019502182.

The spelling of 51895931 in words is "fifty-one million, eight hundred ninety-five thousand, nine hundred thirty-one".