117215520 has 48 divisors (see below), whose sum is σ = 369230400. Its totient is φ = 31257344.

The previous prime is 117215513. The next prime is 117215531. The reversal of 117215520 is 25512711.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121620 + ... + 122579.

It is an arithmetic number, because the mean of its divisors is an integer number (7692300).

Almost surely, 2^117215520 is an apocalyptic number.

117215520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117215520 is an abundant number, since it is smaller than the sum of its proper divisors (252014880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117215520 is a wasteful number, since it uses less digits than its factorization.

117215520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244217 (or 244209 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 117215520 is about 10826.6116583167. The cubic root of 117215520 is about 489.3974545593.

The spelling of 117215520 in words is "one hundred seventeen million, two hundred fifteen thousand, five hundred twenty".