221403052 has 24 divisors (see below), whose sum is σ = 431650800. Its totient is φ = 98661696.

The previous prime is 221403043. The next prime is 221403059. The reversal of 221403052 is 250304122.

221403052 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221403052² = 98038622869829408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221403059) 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, 71902 + ... + 74917.

It is an arithmetic number, because the mean of its divisors is an integer number (17985450).

Almost surely, 2^221403052 is an apocalyptic number.

It is an amenable number.

221403052 is a deficient number, since it is larger than the sum of its proper divisors (210247748).

221403052 is a wasteful number, since it uses less digits than its factorization.

221403052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146865 (or 146863 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 221403052 is about 14879.6186779097. The cubic root of 221403052 is about 604.9616823397.

Adding to 221403052 its reverse (250304122), we get a palindrome (471707174).

The spelling of 221403052 in words is "two hundred twenty-one million, four hundred three thousand, fifty-two".