115521881 has 16 divisors (see below), whose sum is σ = 126202560. Its totient is φ = 105364800.

The previous prime is 115521871. The next prime is 115521949. The reversal of 115521881 is 188125511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115521881 is a prime.

It is a super-2 number, since 2×115521881² = 26690609979556322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115521871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70190 + ... + 71816.

It is an arithmetic number, because the mean of its divisors is an integer number (7887660).

Almost surely, 2^115521881 is an apocalyptic number.

It is an amenable number.

115521881 is a deficient number, since it is larger than the sum of its proper divisors (10680679).

115521881 is a wasteful number, since it uses less digits than its factorization.

115521881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784.

The product of its digits is 3200, while the sum is 32.

The square root of 115521881 is about 10748.1105781435. The cubic root of 115521881 is about 487.0289199938.

The spelling of 115521881 in words is "one hundred fifteen million, five hundred twenty-one thousand, eight hundred eighty-one".