5155121557 has 2 divisors, whose sum is σ = 5155121558. Its totient is φ = 5155121556.

The previous prime is 5155121501. The next prime is 5155121561. The reversal of 5155121557 is 7551215515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5081693796 + 73427761 = 71286^2 + 8569^2 .

It is a cyclic number.

It is not a de Polignac number, because 5155121557 - 2¹⁹ = 5154597269 is a prime.

It is a super-2 number, since 2×5155121557² = 53150556534892208498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5155128557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2577560778 + 2577560779.

It is an arithmetic number, because the mean of its divisors is an integer number (2577560779).

Almost surely, 2^5155121557 is an apocalyptic number.

It is an amenable number.

5155121557 is a deficient number, since it is larger than the sum of its proper divisors (1).

5155121557 is an equidigital number, since it uses as much as digits as its factorization.

5155121557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43750, while the sum is 37.

The square root of 5155121557 is about 71799.1751832847. The cubic root of 5155121557 is about 1727.4797697225.

The spelling of 5155121557 in words is "five billion, one hundred fifty-five million, one hundred twenty-one thousand, five hundred fifty-seven".