51258731 has 2 divisors, whose sum is σ = 51258732. Its totient is φ = 51258730.

The previous prime is 51258703. The next prime is 51258769. The reversal of 51258731 is 13785215.

51258731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51258731 - 2¹⁰ = 51257707 is a prime.

It is a super-2 number, since 2×51258731² = 5254915007460722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51258131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25629365 + 25629366.

It is an arithmetic number, because the mean of its divisors is an integer number (25629366).

Almost surely, 2^51258731 is an apocalyptic number.

51258731 is a deficient number, since it is larger than the sum of its proper divisors (1).

51258731 is an equidigital number, since it uses as much as digits as its factorization.

51258731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 51258731 is about 7159.5203051601. The cubic root of 51258731 is about 371.4690342859.

The spelling of 51258731 in words is "fifty-one million, two hundred fifty-eight thousand, seven hundred thirty-one".