115138155 has 64 divisors (see below), whose sum is σ = 208005120. Its totient is φ = 54362880.

The previous prime is 115138141. The next prime is 115138169. The reversal of 115138155 is 551831511.

It is an interprime number because it is at equal distance from previous prime (115138141) and next prime (115138169).

It is not a de Polignac number, because 115138155 - 2⁴ = 115138139 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1457406 + ... + 1457484.

It is an arithmetic number, because the mean of its divisors is an integer number (3250080).

Almost surely, 2^115138155 is an apocalyptic number.

115138155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115138155 is a deficient number, since it is larger than the sum of its proper divisors (92866965).

115138155 is an equidigital number, since it uses as much as digits as its factorization.

115138155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 171 counting only the distinct ones).

The product of its digits is 3000, while the sum is 30.

The square root of 115138155 is about 10730.2448713904. The cubic root of 115138155 is about 486.4890714248.

Adding to 115138155 its reverse (551831511), we get a palindrome (666969666).

The spelling of 115138155 in words is "one hundred fifteen million, one hundred thirty-eight thousand, one hundred fifty-five".