221431464451464 has 16 divisors (see below), whose sum is σ = 553578661128720. Its totient is φ = 73810488150480.

The previous prime is 221431464451459. The next prime is 221431464451481. The reversal of 221431464451464 is 464154464134122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4613155509382 + ... + 4613155509429.

It is an arithmetic number, because the mean of its divisors is an integer number (34598666320545).

Almost surely, 2^{221431464451464} is an apocalyptic number.

221431464451464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221431464451464 is an abundant number, since it is smaller than the sum of its proper divisors (332147196677256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221431464451464 is a wasteful number, since it uses less digits than its factorization.

221431464451464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226311018820 (or 9226311018816 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 51.

The spelling of 221431464451464 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixty-four million, four hundred fifty-one thousand, four hundred sixty-four".