221231632 has 40 divisors (see below), whose sum is σ = 441936000. Its totient is φ = 107229312.

The previous prime is 221231629. The next prime is 221231639. The reversal of 221231632 is 236132122.

221231632 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221231639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80619 + ... + 83317.

It is an arithmetic number, because the mean of its divisors is an integer number (11048400).

Almost surely, 2^221231632 is an apocalyptic number.

It is an amenable number.

221231632 is a deficient number, since it is larger than the sum of its proper divisors (220704368).

221231632 is a wasteful number, since it uses less digits than its factorization.

221231632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863 (or 2857 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 221231632 is about 14873.8573342627. The cubic root of 221231632 is about 604.8055126967.

Adding to 221231632 its reverse (236132122), we get a palindrome (457363754).

The spelling of 221231632 in words is "two hundred twenty-one million, two hundred thirty-one thousand, six hundred thirty-two".