109115172 has 36 divisors (see below), whose sum is σ = 276166800. Its totient is φ = 36325872.

The previous prime is 109115161. The next prime is 109115177. The reversal of 109115172 is 271511901.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×109115172² = 23812241521179168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109115177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39079 + ... + 41777.

It is an arithmetic number, because the mean of its divisors is an integer number (7671300).

Almost surely, 2^109115172 is an apocalyptic number.

109115172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

109115172 is an abundant number, since it is smaller than the sum of its proper divisors (167051628).

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

109115172 is a wasteful number, since it uses less digits than its factorization.

109115172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832 (or 3827 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 27.

The square root of 109115172 is about 10445.8207911107. The cubic root of 109115172 is about 477.8538035540.

The spelling of 109115172 in words is "one hundred nine million, one hundred fifteen thousand, one hundred seventy-two".