115653621 has 8 divisors (see below), whose sum is σ = 156733024. Its totient is φ = 75838320.

The previous prime is 115653583. The next prime is 115653623. The reversal of 115653621 is 126356511.

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

It is not a de Polignac number, because 115653621 - 2⁶ = 115653557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115653623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315811 + ... + 316176.

It is an arithmetic number, because the mean of its divisors is an integer number (19591628).

Almost surely, 2^115653621 is an apocalyptic number.

It is an amenable number.

115653621 is a deficient number, since it is larger than the sum of its proper divisors (41079403).

115653621 is an equidigital number, since it uses as much as digits as its factorization.

115653621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632051.

The product of its digits is 5400, while the sum is 30.

The square root of 115653621 is about 10754.2373509236. The cubic root of 115653621 is about 487.2139839696.

The spelling of 115653621 in words is "one hundred fifteen million, six hundred fifty-three thousand, six hundred twenty-one".