15155255257 has 2 divisors, whose sum is σ = 15155255258. Its totient is φ = 15155255256.

The previous prime is 15155255249. The next prime is 15155255281. The reversal of 15155255257 is 75255255151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14800912281 + 354342976 = 121659^2 + 18824^2 .

It is a cyclic number.

It is not a de Polignac number, because 15155255257 - 2³ = 15155255249 is a prime.

It is a super-2 number, since 2×15155255257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15155252257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7577627628 + 7577627629.

It is an arithmetic number, because the mean of its divisors is an integer number (7577627629).

Almost surely, 2^15155255257 is an apocalyptic number.

It is an amenable number.

15155255257 is a deficient number, since it is larger than the sum of its proper divisors (1).

15155255257 is an equidigital number, since it uses as much as digits as its factorization.

15155255257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437500, while the sum is 43.

The spelling of 15155255257 in words is "fifteen billion, one hundred fifty-five million, two hundred fifty-five thousand, two hundred fifty-seven".