221113425 has 24 divisors (see below), whose sum is σ = 393697024. Its totient is φ = 108855360.

The previous prime is 221113397. The next prime is 221113433. The reversal of 221113425 is 524311122.

It is not a de Polignac number, because 221113425 - 2²⁵ = 187558993 is a prime.

It is a super-2 number, since 2×221113425² = 97782293430461250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112417 + ... + 114366.

Almost surely, 2^221113425 is an apocalyptic number.

221113425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221113425 is a deficient number, since it is larger than the sum of its proper divisors (172583599).

221113425 is a wasteful number, since it uses less digits than its factorization.

221113425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226809 (or 226804 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 221113425 is about 14869.8831535423. The cubic root of 221113425 is about 604.6977749658.

Adding to 221113425 its reverse (524311122), we get a palindrome (745424547).

The spelling of 221113425 in words is "two hundred twenty-one million, one hundred thirteen thousand, four hundred twenty-five".