215855230 has 32 divisors (see below), whose sum is σ = 406508544. Its totient is φ = 82369056.

The previous prime is 215855221. The next prime is 215855251. The reversal of 215855230 is 32558512.

It is a junction number, because it is equal to n+sod(n) for n = 215855192 and 215855201.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 105477 + ... + 107503.

It is an arithmetic number, because the mean of its divisors is an integer number (12703392).

Almost surely, 2^215855230 is an apocalyptic number.

215855230 is a deficient number, since it is larger than the sum of its proper divisors (190653314).

215855230 is a wasteful number, since it uses less digits than its factorization.

215855230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 215855230 is about 14692.0124557530. The cubic root of 215855230 is about 599.8659237452.

The spelling of 215855230 in words is "two hundred fifteen million, eight hundred fifty-five thousand, two hundred thirty".