221153432 has 8 divisors (see below), whose sum is σ = 414662700. Its totient is φ = 110576712.

The previous prime is 221153431. The next prime is 221153437. The reversal of 221153432 is 234351122.

221153432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 221153398 and 221153407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221153431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13822082 + ... + 13822097.

Almost surely, 2^221153432 is an apocalyptic number.

It is an amenable number.

221153432 is a deficient number, since it is larger than the sum of its proper divisors (193509268).

221153432 is a wasteful number, since it uses less digits than its factorization.

221153432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27644185 (or 27644181 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 221153432 is about 14871.2283285544. The cubic root of 221153432 is about 604.7342429535.

The spelling of 221153432 in words is "two hundred twenty-one million, one hundred fifty-three thousand, four hundred thirty-two".