215021104 has 20 divisors (see below), whose sum is σ = 416842864. Its totient is φ = 107448768.

The previous prime is 215021087. The next prime is 215021111. The reversal of 215021104 is 401120512.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39814 + ... + 44890.

Almost surely, 2^215021104 is an apocalyptic number.

It is an amenable number.

215021104 is a deficient number, since it is larger than the sum of its proper divisors (201821760).

215021104 is a wasteful number, since it uses less digits than its factorization.

215021104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7732 (or 7726 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 215021104 is about 14663.5979213834. The cubic root of 215021104 is about 599.0922421335.

Adding to 215021104 its reverse (401120512), we get a palindrome (616141616).

The spelling of 215021104 in words is "two hundred fifteen million, twenty-one thousand, one hundred four".