51931037 has 2 divisors, whose sum is σ = 51931038. Its totient is φ = 51931036.

The previous prime is 51931021. The next prime is 51931063. The reversal of 51931037 is 73013915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46389721 + 5541316 = 6811^2 + 2354^2 .

It is a cyclic number.

It is not a de Polignac number, because 51931037 - 2⁴ = 51931021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51931007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25965518 + 25965519.

It is an arithmetic number, because the mean of its divisors is an integer number (25965519).

Almost surely, 2^51931037 is an apocalyptic number.

It is an amenable number.

51931037 is a deficient number, since it is larger than the sum of its proper divisors (1).

51931037 is an equidigital number, since it uses as much as digits as its factorization.

51931037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 51931037 is about 7206.3192407775. The cubic root of 51931037 is about 373.0860393727.

The spelling of 51931037 in words is "fifty-one million, nine hundred thirty-one thousand, thirty-seven".