51495637 has 2 divisors, whose sum is σ = 51495638. Its totient is φ = 51495636.

The previous prime is 51495611. The next prime is 51495641. The reversal of 51495637 is 73659415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45778756 + 5716881 = 6766^2 + 2391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51495637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51495637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51495337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25747818 + 25747819.

It is an arithmetic number, because the mean of its divisors is an integer number (25747819).

Almost surely, 2^51495637 is an apocalyptic number.

It is an amenable number.

51495637 is a deficient number, since it is larger than the sum of its proper divisors (1).

51495637 is an equidigital number, since it uses as much as digits as its factorization.

51495637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 51495637 is about 7176.0460561510. The cubic root of 51495637 is about 372.0404362141.

The spelling of 51495637 in words is "fifty-one million, four hundred ninety-five thousand, six hundred thirty-seven".