51100610557 has 2 divisors, whose sum is σ = 51100610558. Its totient is φ = 51100610556.

The previous prime is 51100610453. The next prime is 51100610567. The reversal of 51100610557 is 75501600115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35197887321 + 15902723236 = 187611^2 + 126106^2 .

It is a cyclic number.

It is not a de Polignac number, because 51100610557 - 2¹⁹ = 51100086269 is a prime.

It is a super-2 number, since 2×51100610557² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51100610567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550305278 + 25550305279.

It is an arithmetic number, because the mean of its divisors is an integer number (25550305279).

Almost surely, 2^51100610557 is an apocalyptic number.

It is an amenable number.

51100610557 is a deficient number, since it is larger than the sum of its proper divisors (1).

51100610557 is an equidigital number, since it uses as much as digits as its factorization.

51100610557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 31.

The spelling of 51100610557 in words is "fifty-one billion, one hundred million, six hundred ten thousand, five hundred fifty-seven".