51517457 has 2 divisors, whose sum is σ = 51517458. Its totient is φ = 51517456.

The previous prime is 51517451. The next prime is 51517471. The reversal of 51517457 is 75471515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50353216 + 1164241 = 7096^2 + 1079^2 .

It is a cyclic number.

It is not a de Polignac number, because 51517457 - 2⁴ = 51517441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51517451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25758728 + 25758729.

It is an arithmetic number, because the mean of its divisors is an integer number (25758729).

Almost surely, 2^51517457 is an apocalyptic number.

It is an amenable number.

51517457 is a deficient number, since it is larger than the sum of its proper divisors (1).

51517457 is an equidigital number, since it uses as much as digits as its factorization.

51517457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24500, while the sum is 35.

The square root of 51517457 is about 7177.5662309727. The cubic root of 51517457 is about 372.0929764323.

The spelling of 51517457 in words is "fifty-one million, five hundred seventeen thousand, four hundred fifty-seven".