115653813 has 16 divisors (see below), whose sum is σ = 168776256. Its totient is φ = 69863040.

The previous prime is 115653803. The next prime is 115653847. The reversal of 115653813 is 318356511.

It is not a de Polignac number, because 115653813 - 2⁸ = 115653557 is a prime.

It is a super-2 number, since 2×115653813² = 26751608922877938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115653803) 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, 4731 + ... + 15927.

It is an arithmetic number, because the mean of its divisors is an integer number (10548516).

Almost surely, 2^115653813 is an apocalyptic number.

It is an amenable number.

115653813 is a deficient number, since it is larger than the sum of its proper divisors (53122443).

115653813 is a wasteful number, since it uses less digits than its factorization.

115653813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11524.

The product of its digits is 10800, while the sum is 33.

The square root of 115653813 is about 10754.2462776338. The cubic root of 115653813 is about 487.2142535823.

The spelling of 115653813 in words is "one hundred fifteen million, six hundred fifty-three thousand, eight hundred thirteen".