221423133 has 16 divisors (see below), whose sum is σ = 304122816. Its totient is φ = 143193600.

The previous prime is 221423123. The next prime is 221423171. The reversal of 221423133 is 331324122.

221423133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221423133 - 2⁵ = 221423101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221423123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36358 + ... + 42008.

It is an arithmetic number, because the mean of its divisors is an integer number (19007676).

Almost surely, 2^221423133 is an apocalyptic number.

It is an amenable number.

221423133 is a deficient number, since it is larger than the sum of its proper divisors (82699683).

221423133 is a wasteful number, since it uses less digits than its factorization.

221423133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6044.

The product of its digits is 864, while the sum is 21.

The square root of 221423133 is about 14880.2934446872. The cubic root of 221423133 is about 604.9799715611.

Adding to 221423133 its reverse (331324122), we get a palindrome (552747255).

The spelling of 221423133 in words is "two hundred twenty-one million, four hundred twenty-three thousand, one hundred thirty-three".