51372031 has 2 divisors, whose sum is σ = 51372032. Its totient is φ = 51372030.

The previous prime is 51372023. The next prime is 51372059. The reversal of 51372031 is 13027315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51372031 - 2³ = 51372023 is a prime.

It is a super-2 number, since 2×51372031² = 5278171138129922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51371993 and 51372011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51372131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25686015 + 25686016.

It is an arithmetic number, because the mean of its divisors is an integer number (25686016).

Almost surely, 2^51372031 is an apocalyptic number.

51372031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51372031 is an equidigital number, since it uses as much as digits as its factorization.

51372031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 51372031 is about 7167.4284788898. The cubic root of 51372031 is about 371.7425257112.

Adding to 51372031 its reverse (13027315), we get a palindrome (64399346).

The spelling of 51372031 in words is "fifty-one million, three hundred seventy-two thousand, thirty-one".