221256232 has 8 divisors (see below), whose sum is σ = 414855450. Its totient is φ = 110628112.

The previous prime is 221256229. The next prime is 221256271. The reversal of 221256232 is 232652122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 205463556 + 15792676 = 14334^2 + 3974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 221256197 and 221256206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13828507 + ... + 13828522.

Almost surely, 2^221256232 is an apocalyptic number.

It is an amenable number.

221256232 is a deficient number, since it is larger than the sum of its proper divisors (193599218).

221256232 is a wasteful number, since it uses less digits than its factorization.

221256232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27657035 (or 27657031 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 221256232 is about 14874.6842655567. The cubic root of 221256232 is about 604.8279291177.

The spelling of 221256232 in words is "two hundred twenty-one million, two hundred fifty-six thousand, two hundred thirty-two".