115115550 has 48 divisors (see below), whose sum is σ = 311444352. Its totient is φ = 27906400.

The previous prime is 115115543. The next prime is 115115557. The reversal of 115115550 is 55511511.

It is an interprime number because it is at equal distance from previous prime (115115543) and next prime (115115557).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115115550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115115557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33234 + ... + 36533.

It is an arithmetic number, because the mean of its divisors is an integer number (6488424).

Almost surely, 2^115115550 is an apocalyptic number.

115115550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115115550 is an abundant number, since it is smaller than the sum of its proper divisors (196328802).

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

115115550 is a wasteful number, since it uses less digits than its factorization.

115115550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69793 (or 69788 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 24.

The square root of 115115550 is about 10729.1914886444. The cubic root of 115115550 is about 486.4572319787.

The spelling of 115115550 in words is "one hundred fifteen million, one hundred fifteen thousand, five hundred fifty".