221426452 has 24 divisors (see below), whose sum is σ = 417725000. Its totient is φ = 102093696.

The previous prime is 221426419. The next prime is 221426477. The reversal of 221426452 is 254624122.

It can be written as a sum of positive squares in 4 ways, for example, as 2268036 + 219158416 = 1506^2 + 14804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221426452.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 79174 + ... + 81922.

Almost surely, 2^221426452 is an apocalyptic number.

It is an amenable number.

221426452 is a deficient number, since it is larger than the sum of its proper divisors (196298548).

221426452 is a wasteful number, since it uses less digits than its factorization.

221426452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315 (or 4313 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 221426452 is about 14880.4049676076. The cubic root of 221426452 is about 604.9829943083.

The spelling of 221426452 in words is "two hundred twenty-one million, four hundred twenty-six thousand, four hundred fifty-two".