51502513 has 2 divisors, whose sum is σ = 51502514. Its totient is φ = 51502512.

The previous prime is 51502453. The next prime is 51502541. The reversal of 51502513 is 31520515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49449024 + 2053489 = 7032^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 51502513 - 2¹³ = 51494321 is a prime.

It is not a weakly prime, because it can be changed into another prime (51502613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25751256 + 25751257.

It is an arithmetic number, because the mean of its divisors is an integer number (25751257).

Almost surely, 2^51502513 is an apocalyptic number.

It is an amenable number.

51502513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51502513 is an equidigital number, since it uses as much as digits as its factorization.

51502513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 51502513 is about 7176.5251340743. The cubic root of 51502513 is about 372.0569944855.

The spelling of 51502513 in words is "fifty-one million, five hundred two thousand, five hundred thirteen".