215862223428 has 24 divisors (see below), whose sum is σ = 559642801760. Its totient is φ = 71954074440.

The previous prime is 215862223333. The next prime is 215862223453. The reversal of 215862223428 is 824322268512.

215862223428 is a `hidden beast` number, since 2 + 1 + 5 + 86 + 222 + 342 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999362038 + ... + 999362253.

Almost surely, 2^215862223428 is an apocalyptic number.

It is an amenable number.

215862223428 is an abundant number, since it is smaller than the sum of its proper divisors (343780578332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215862223428 is a wasteful number, since it uses less digits than its factorization.

215862223428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998724304 (or 1998724296 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The spelling of 215862223428 in words is "two hundred fifteen billion, eight hundred sixty-two million, two hundred twenty-three thousand, four hundred twenty-eight".