221431135446544 has 20 divisors (see below), whose sum is σ = 429026527665360. Its totient is φ = 110714612178080.

The previous prime is 221431135446539. The next prime is 221431135446589. The reversal of 221431135446544 is 445644531134122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57807922 + ... + 61519249.

It is an arithmetic number, because the mean of its divisors is an integer number (21451326383268).

Almost surely, 2^{221431135446544} is an apocalyptic number.

It is an amenable number.

221431135446544 is a deficient number, since it is larger than the sum of its proper divisors (207595392218816).

221431135446544 is a wasteful number, since it uses less digits than its factorization.

221431135446544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119443158 (or 119443152 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 49.

The spelling of 221431135446544 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, one hundred thirty-five million, four hundred forty-six thousand, five hundred forty-four".