215760231 has 6 divisors (see below), whose sum is σ = 311653680. Its totient is φ = 143840148.

The previous prime is 215760229. The next prime is 215760239. The reversal of 215760231 is 132067512.

It is a happy number.

215760231 is a `hidden beast` number, since 2 + 1 + 57 + 602 + 3 + 1 = 666.

It is not a de Polignac number, because 215760231 - 2¹ = 215760229 is a prime.

It is a super-2 number, since 2×215760231² = 93104954562346722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215760195 and 215760204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215760239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11986671 + ... + 11986688.

It is an arithmetic number, because the mean of its divisors is an integer number (51942280).

Almost surely, 2^215760231 is an apocalyptic number.

215760231 is a deficient number, since it is larger than the sum of its proper divisors (95893449).

215760231 is a wasteful number, since it uses less digits than its factorization.

215760231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23973365 (or 23973362 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 215760231 is about 14688.7790847299. The cubic root of 215760231 is about 599.7779094698. Note that the first 3 decimals are identical.

The spelling of 215760231 in words is "two hundred fifteen million, seven hundred sixty thousand, two hundred thirty-one".