115431557 has 2 divisors, whose sum is σ = 115431558. Its totient is φ = 115431556.

The previous prime is 115431541. The next prime is 115431607. The reversal of 115431557 is 755134511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109286116 + 6145441 = 10454^2 + 2479^2 .

It is an emirp because it is prime and its reverse (755134511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115431557 - 2⁴ = 115431541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115433557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57715778 + 57715779.

It is an arithmetic number, because the mean of its divisors is an integer number (57715779).

Almost surely, 2^115431557 is an apocalyptic number.

It is an amenable number.

115431557 is a deficient number, since it is larger than the sum of its proper divisors (1).

115431557 is an equidigital number, since it uses as much as digits as its factorization.

115431557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 115431557 is about 10743.9079016901. The cubic root of 115431557 is about 486.9019545225.

The spelling of 115431557 in words is "one hundred fifteen million, four hundred thirty-one thousand, five hundred fifty-seven".