117824215 has 4 divisors (see below), whose sum is σ = 141389064. Its totient is φ = 94259368.

The previous prime is 117824209. The next prime is 117824219. The reversal of 117824215 is 512428711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512428711 = 13709 ⋅37379.

It is a cyclic number.

It is not a de Polignac number, because 117824215 - 2³ = 117824207 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 (117824219) 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, 11782417 + ... + 11782426.

It is an arithmetic number, because the mean of its divisors is an integer number (35347266).

Almost surely, 2^117824215 is an apocalyptic number.

117824215 is a deficient number, since it is larger than the sum of its proper divisors (23564849).

117824215 is an equidigital number, since it uses as much as digits as its factorization.

117824215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23564848.

The product of its digits is 4480, while the sum is 31.

The square root of 117824215 is about 10854.6863151360. The cubic root of 117824215 is about 490.2431321521.

The spelling of 117824215 in words is "one hundred seventeen million, eight hundred twenty-four thousand, two hundred fifteen".