215230851 has 20 divisors (see below), whose sum is σ = 350748024. Its totient is φ = 130442400.

The previous prime is 215230823. The next prime is 215230859. The reversal of 215230851 is 158032512.

It is a happy number.

It is not a de Polignac number, because 215230851 - 2⁵ = 215230819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (215230859) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119890 + ... + 121671.

Almost surely, 2^215230851 is an apocalyptic number.

215230851 is a deficient number, since it is larger than the sum of its proper divisors (135517173).

215230851 is a wasteful number, since it uses less digits than its factorization.

215230851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241584 (or 241575 counting only the distinct ones).

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

The square root of 215230851 is about 14670.7481404324. The cubic root of 215230851 is about 599.2869780017.

The spelling of 215230851 in words is "two hundred fifteen million, two hundred thirty thousand, eight hundred fifty-one".