221325442 has 24 divisors (see below), whose sum is σ = 360594180. Its totient is φ = 101836800.

The previous prime is 221325439. The next prime is 221325451. The reversal of 221325442 is 244523122.

It can be written as a sum of positive squares in 6 ways, for example, as 157979761 + 63345681 = 12569^2 + 7959^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137442 + ... + 139042.

Almost surely, 2^221325442 is an apocalyptic number.

221325442 is a deficient number, since it is larger than the sum of its proper divisors (139268738).

221325442 is a wasteful number, since it uses less digits than its factorization.

221325442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038 (or 2025 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 221325442 is about 14877.0105195903. The cubic root of 221325442 is about 604.8909868926.

Adding to 221325442 its reverse (244523122), we get a palindrome (465848564).

The spelling of 221325442 in words is "two hundred twenty-one million, three hundred twenty-five thousand, four hundred forty-two".