215957241 has 12 divisors (see below), whose sum is σ = 312515632. Its totient is φ = 143705016.

The previous prime is 215957213. The next prime is 215957243. The reversal of 215957241 is 142759512.

215957241 is a `hidden beast` number, since 21 + 595 + 7 + 2 + 41 = 666.

It is not a de Polignac number, because 215957241 - 2⁶ = 215957177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215957196 and 215957205.

It is not an unprimeable number, because it can be changed into a prime (215957243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17011 + ... + 26856.

Almost surely, 2^215957241 is an apocalyptic number.

It is an amenable number.

215957241 is a deficient number, since it is larger than the sum of its proper divisors (96558391).

215957241 is a wasteful number, since it uses less digits than its factorization.

215957241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44420 (or 44417 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 215957241 is about 14695.4836939789. The cubic root of 215957241 is about 599.9604057205.

The spelling of 215957241 in words is "two hundred fifteen million, nine hundred fifty-seven thousand, two hundred forty-one".