118215955 has 32 divisors (see below), whose sum is σ = 168412608. Its totient is φ = 78528000.

The previous prime is 118215953. The next prime is 118215959. The reversal of 118215955 is 559512811.

It is not a de Polignac number, because 118215955 - 2¹ = 118215953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118215953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71397 + ... + 73033.

It is an arithmetic number, because the mean of its divisors is an integer number (5262894).

Almost surely, 2^118215955 is an apocalyptic number.

118215955 is a deficient number, since it is larger than the sum of its proper divisors (50196653).

118215955 is a wasteful number, since it uses less digits than its factorization.

118215955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767.

The product of its digits is 18000, while the sum is 37.

The square root of 118215955 is about 10872.7160820101. The cubic root of 118215955 is about 490.7858485416.

The spelling of 118215955 in words is "one hundred eighteen million, two hundred fifteen thousand, nine hundred fifty-five".