215871652 has 12 divisors (see below), whose sum is σ = 394200576. Its totient is φ = 103242920.

The previous prime is 215871613. The next prime is 215871671. The reversal of 215871652 is 256178512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173124 + ... + 1173307.

It is an arithmetic number, because the mean of its divisors is an integer number (32850048).

Almost surely, 2^215871652 is an apocalyptic number.

It is an amenable number.

215871652 is a deficient number, since it is larger than the sum of its proper divisors (178328924).

215871652 is a wasteful number, since it uses less digits than its factorization.

215871652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346458 (or 2346456 counting only the distinct ones).

The product of its digits is 33600, while the sum is 37.

The square root of 215871652 is about 14692.5713202285. The cubic root of 215871652 is about 599.8811357129.

The spelling of 215871652 in words is "two hundred fifteen million, eight hundred seventy-one thousand, six hundred fifty-two".