51055657 has 2 divisors, whose sum is σ = 51055658. Its totient is φ = 51055656.

The previous prime is 51055643. The next prime is 51055681. The reversal of 51055657 is 75655015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25613721 + 25441936 = 5061^2 + 5044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51055657 is a prime.

It is a super-2 number, since 2×51055657² = 5213360223403298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51055057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25527828 + 25527829.

It is an arithmetic number, because the mean of its divisors is an integer number (25527829).

Almost surely, 2^51055657 is an apocalyptic number.

It is an amenable number.

51055657 is a deficient number, since it is larger than the sum of its proper divisors (1).

51055657 is an equidigital number, since it uses as much as digits as its factorization.

51055657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 51055657 is about 7145.3241354049. The cubic root of 51055657 is about 370.9778298931.

The spelling of 51055657 in words is "fifty-one million, fifty-five thousand, six hundred fifty-seven".