51501731 has 2 divisors, whose sum is σ = 51501732. Its totient is φ = 51501730.

The previous prime is 51501727. The next prime is 51501739. The reversal of 51501731 is 13710515.

51501731 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 51501731 - 2² = 51501727 is a prime.

It is a super-2 number, since 2×51501731² = 5304856591992722, 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 = 51501697 and 51501706.

It is not a weakly prime, because it can be changed into another prime (51501739) 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, 25750865 + 25750866.

It is an arithmetic number, because the mean of its divisors is an integer number (25750866).

Almost surely, 2^51501731 is an apocalyptic number.

51501731 is a deficient number, since it is larger than the sum of its proper divisors (1).

51501731 is an equidigital number, since it uses as much as digits as its factorization.

51501731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 525, while the sum is 23.

The square root of 51501731 is about 7176.4706506750. The cubic root of 51501731 is about 372.0551114056.

The spelling of 51501731 in words is "fifty-one million, five hundred one thousand, seven hundred thirty-one".