115571557 has 4 divisors (see below), whose sum is σ = 116055360. Its totient is φ = 115087756.

The previous prime is 115571551. The next prime is 115571563. The reversal of 115571557 is 755175511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (115571551) and next prime (115571563).

It is a cyclic number.

It is not a de Polignac number, because 115571557 - 2¹⁵ = 115538789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115571551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241543 + ... + 242020.

It is an arithmetic number, because the mean of its divisors is an integer number (29013840).

Almost surely, 2^115571557 is an apocalyptic number.

It is an amenable number.

115571557 is a deficient number, since it is larger than the sum of its proper divisors (483803).

115571557 is an equidigital number, since it uses as much as digits as its factorization.

115571557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483802.

The product of its digits is 30625, while the sum is 37.

The square root of 115571557 is about 10750.4212475605. The cubic root of 115571557 is about 487.0987197044.

The spelling of 115571557 in words is "one hundred fifteen million, five hundred seventy-one thousand, five hundred fifty-seven".