115215621 has 8 divisors (see below), whose sum is σ = 154027680. Its totient is φ = 76606992.

The previous prime is 115215589. The next prime is 115215629. The reversal of 115215621 is 126512511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115215621 - 2⁵ = 115215589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115215591 and 115215600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115215629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49530 + ... + 51803.

It is an arithmetic number, because the mean of its divisors is an integer number (19253460).

Almost surely, 2^115215621 is an apocalyptic number.

It is an amenable number.

115215621 is a deficient number, since it is larger than the sum of its proper divisors (38812059).

115215621 is a wasteful number, since it uses less digits than its factorization.

115215621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101715.

The product of its digits is 600, while the sum is 24.

The square root of 115215621 is about 10733.8539677042. The cubic root of 115215621 is about 486.5981517253.

The spelling of 115215621 in words is "one hundred fifteen million, two hundred fifteen thousand, six hundred twenty-one".