221432402004 has 48 divisors (see below), whose sum is σ = 596801774016. Its totient is φ = 63153625600.

The previous prime is 221432401999. The next prime is 221432402039. The reversal of 221432402004 is 400204234122.

It is a super-2 number, since 2×221432402004² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49336527 + ... + 49341014.

It is an arithmetic number, because the mean of its divisors is an integer number (12433370292).

Almost surely, 2^221432402004 is an apocalyptic number.

It is an amenable number.

221432402004 is an abundant number, since it is smaller than the sum of its proper divisors (375369372012).

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

221432402004 is a wasteful number, since it uses less digits than its factorization.

221432402004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98677576 (or 98677574 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 221432402004 its reverse (400204234122), we get a palindrome (621636636126).

The spelling of 221432402004 in words is "two hundred twenty-one billion, four hundred thirty-two million, four hundred two thousand, four".