117321815 has 8 divisors (see below), whose sum is σ = 151615968. Its totient is φ = 86637600.

The previous prime is 117321803. The next prime is 117321817. The reversal of 117321815 is 518123711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117321815 - 2¹² = 117317719 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 (117321817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902411 + ... + 902540.

It is an arithmetic number, because the mean of its divisors is an integer number (18951996).

Almost surely, 2^117321815 is an apocalyptic number.

117321815 is a deficient number, since it is larger than the sum of its proper divisors (34294153).

117321815 is a wasteful number, since it uses less digits than its factorization.

117321815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804969.

The product of its digits is 1680, while the sum is 29.

The square root of 117321815 is about 10831.5195148234. The cubic root of 117321815 is about 489.5453439221.

The spelling of 117321815 in words is "one hundred seventeen million, three hundred twenty-one thousand, eight hundred fifteen".