215113631 has 8 divisors (see below), whose sum is σ = 228251520. Its totient is φ = 202029568.

The previous prime is 215113621. The next prime is 215113637. The reversal of 215113631 is 136311512.

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

It is a cyclic number.

It is not a de Polignac number, because 215113631 - 2²⁶ = 148004767 is a prime.

It is a super-2 number, since 2×215113631² = 92547748484008322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215113597 and 215113606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215113637) 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, 5066 + ... + 21351.

It is an arithmetic number, because the mean of its divisors is an integer number (28531440).

Almost surely, 2^215113631 is an apocalyptic number.

215113631 is a deficient number, since it is larger than the sum of its proper divisors (13137889).

215113631 is a wasteful number, since it uses less digits than its factorization.

215113631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26913.

The product of its digits is 540, while the sum is 23.

The square root of 215113631 is about 14666.7525717181. The cubic root of 215113631 is about 599.1781627829.

The spelling of 215113631 in words is "two hundred fifteen million, one hundred thirteen thousand, six hundred thirty-one".