23221152 has 36 divisors (see below), whose sum is σ = 66035970. Its totient is φ = 7740288.

The previous prime is 23221151. The next prime is 23221153. The reversal of 23221152 is 25112232.

It is an interprime number because it is at equal distance from previous prime (23221151) and next prime (23221153).

It can be written as a sum of positive squares in only one way, i.e., 19395216 + 3825936 = 4404^2 + 1956^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (23221151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40027 + ... + 40602.

Almost surely, 2^23221152 is an apocalyptic number.

It is an amenable number.

23221152 is an abundant number, since it is smaller than the sum of its proper divisors (42814818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23221152 is a wasteful number, since it uses less digits than its factorization.

23221152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80645 (or 80634 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 23221152 is about 4818.8330537590. The cubic root of 23221152 is about 285.2952802972.

Adding to 23221152 its reverse (25112232), we get a palindrome (48333384).

The spelling of 23221152 in words is "twenty-three million, two hundred twenty-one thousand, one hundred fifty-two".