221356552 has 16 divisors (see below), whose sum is σ = 415688940. Its totient is φ = 110506176.

The previous prime is 221356537. The next prime is 221356559. The reversal of 221356552 is 255653122.

It is a happy number.

221356552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 185667876 + 35688676 = 13626^2 + 5974^2 .

It is a super-2 number, since 2×221356552² = 97997446226657408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221356559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15963 + ... + 26410.

Almost surely, 2^221356552 is an apocalyptic number.

It is an amenable number.

221356552 is a deficient number, since it is larger than the sum of its proper divisors (194332388).

221356552 is a wasteful number, since it uses less digits than its factorization.

221356552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43032 (or 43028 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 221356552 is about 14878.0560558159. The cubic root of 221356552 is about 604.9193271756.

The spelling of 221356552 in words is "two hundred twenty-one million, three hundred fifty-six thousand, five hundred fifty-two".