115621550 has 72 divisors (see below), whose sum is σ = 244906200. Its totient is φ = 40532800.

The previous prime is 115621549. The next prime is 115621553. The reversal of 115621550 is 55126511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115621553) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 175121 + ... + 175779.

It is an arithmetic number, because the mean of its divisors is an integer number (3401475).

Almost surely, 2^115621550 is an apocalyptic number.

115621550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115621550 is an abundant number, since it is smaller than the sum of its proper divisors (129284650).

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

115621550 is a wasteful number, since it uses less digits than its factorization.

115621550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 115621550 is about 10752.7461608651. The cubic root of 115621550 is about 487.1689446413.

The spelling of 115621550 in words is "one hundred fifteen million, six hundred twenty-one thousand, five hundred fifty".