117551557 has 4 divisors (see below), whose sum is σ = 117574380. Its totient is φ = 117528736.

The previous prime is 117551519. The next prime is 117551561. The reversal of 117551557 is 755155711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 933156 + 116618401 = 966^2 + 10799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117551557 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 (117551507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369 + ... + 15337.

It is an arithmetic number, because the mean of its divisors is an integer number (29393595).

Almost surely, 2^117551557 is an apocalyptic number.

It is an amenable number.

117551557 is a deficient number, since it is larger than the sum of its proper divisors (22823).

117551557 is an equidigital number, since it uses as much as digits as its factorization.

117551557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22822.

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

The square root of 117551557 is about 10842.1195805986. The cubic root of 117551557 is about 489.8646815010.

The spelling of 117551557 in words is "one hundred seventeen million, five hundred fifty-one thousand, five hundred fifty-seven".