221123433 has 16 divisors (see below), whose sum is σ = 303258240. Its totient is φ = 143214336.

The previous prime is 221123429. The next prime is 221123447. The reversal of 221123433 is 334321122.

221123433 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 221123433 - 2² = 221123429 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221123453) 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, 107428 + ... + 109466.

It is an arithmetic number, because the mean of its divisors is an integer number (18953640).

Almost surely, 2^221123433 is an apocalyptic number.

It is an amenable number.

221123433 is a deficient number, since it is larger than the sum of its proper divisors (82134807).

221123433 is a wasteful number, since it uses less digits than its factorization.

221123433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056.

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

The square root of 221123433 is about 14870.2196688549. The cubic root of 221123433 is about 604.7068980724.

Adding to 221123433 its reverse (334321122), we get a palindrome (555444555).

The spelling of 221123433 in words is "two hundred twenty-one million, one hundred twenty-three thousand, four hundred thirty-three".