215058231 has 12 divisors (see below), whose sum is σ = 311636208. Its totient is φ = 142912224.

The previous prime is 215058223. The next prime is 215058241. The reversal of 215058231 is 132850512.

It is a happy number.

215058231 is a `hidden beast` number, since 2 + 1 + 50 + 582 + 31 = 666.

It is not a de Polignac number, because 215058231 - 2³ = 215058223 is a prime.

It is a super-2 number, since 2×215058231² = 92500085441698722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215058195 and 215058204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215058241) 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, 35355 + ... + 40988.

It is an arithmetic number, because the mean of its divisors is an integer number (25969684).

Almost surely, 2^215058231 is an apocalyptic number.

215058231 is a deficient number, since it is larger than the sum of its proper divisors (96577977).

215058231 is a wasteful number, since it uses less digits than its factorization.

215058231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76662 (or 76659 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 215058231 is about 14664.8638248025. The cubic root of 215058231 is about 599.1267212570.

The spelling of 215058231 in words is "two hundred fifteen million, fifty-eight thousand, two hundred thirty-one".