221152604 has 6 divisors (see below), whose sum is σ = 387017064. Its totient is φ = 110576300.

The previous prime is 221152553. The next prime is 221152619. The reversal of 221152604 is 406251122.

It is a happy number.

221152604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221152604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27644072 + ... + 27644079.

It is an arithmetic number, because the mean of its divisors is an integer number (64502844).

Almost surely, 2^221152604 is an apocalyptic number.

It is an amenable number.

221152604 is a deficient number, since it is larger than the sum of its proper divisors (165864460).

221152604 is a wasteful number, since it uses less digits than its factorization.

221152604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55288155 (or 55288153 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 221152604 is about 14871.2004895368. The cubic root of 221152604 is about 604.7334882428.

The spelling of 221152604 in words is "two hundred twenty-one million, one hundred fifty-two thousand, six hundred four".