221225424432 has 40 divisors (see below), whose sum is σ = 572462828784. Its totient is φ = 73617444864.

The previous prime is 221225424421. The next prime is 221225424451. The reversal of 221225424432 is 234424522122.

It is a junction number, because it is equal to n+sod(n) for n = 221225424393 and 221225424402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3857593 + ... + 3914520.

Almost surely, 2^221225424432 is an apocalyptic number.

It is an amenable number.

221225424432 is an abundant number, since it is smaller than the sum of its proper divisors (351237404352).

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

221225424432 is a wasteful number, since it uses less digits than its factorization.

221225424432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7772717 (or 7772711 counting only the distinct ones).

The product of its digits is 61440, while the sum is 33.

Adding to 221225424432 its reverse (234424522122), we get a palindrome (455649946554).

The spelling of 221225424432 in words is "two hundred twenty-one billion, two hundred twenty-five million, four hundred twenty-four thousand, four hundred thirty-two".