221430552435625 has 80 divisors (see below), whose sum is σ = 316545291832000. Its totient is φ = 153490518432000.

The previous prime is 221430552435611. The next prime is 221430552435667. The reversal of 221430552435625 is 526534255034122.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-221430552435625 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10247206 + ... + 23406544.

It is an arithmetic number, because the mean of its divisors is an integer number (3956816147900).

Almost surely, 2^{221430552435625} is an apocalyptic number.

221430552435625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221430552435625 is a deficient number, since it is larger than the sum of its proper divisors (95114739396375).

221430552435625 is a wasteful number, since it uses less digits than its factorization.

221430552435625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13159500 (or 13159485 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 49.

The spelling of 221430552435625 in words is "two hundred twenty-one trillion, four hundred thirty billion, five hundred fifty-two million, four hundred thirty-five thousand, six hundred twenty-five".