23121232 has 10 divisors (see below), whose sum is σ = 44797418. Its totient is φ = 11560608.

The previous prime is 23121209. The next prime is 23121247. The reversal of 23121232 is 23212132.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 3549456 = 4424^2 + 1884^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 1445077 = 23121232 / (2 + 3 + 1 + 2 + 1 + 2 + 3 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722523 + ... + 722554.

Almost surely, 2^23121232 is an apocalyptic number.

It is an amenable number.

23121232 is a deficient number, since it is larger than the sum of its proper divisors (21676186).

23121232 is a wasteful number, since it uses less digits than its factorization.

23121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445085 (or 1445079 counting only the distinct ones).

The product of its digits is 144, while the sum is 16.

The square root of 23121232 is about 4808.4542214728. The cubic root of 23121232 is about 284.8854859525.

Adding to 23121232 its reverse (23212132), we get a palindrome (46333364).

The spelling of 23121232 in words is "twenty-three million, one hundred twenty-one thousand, two hundred thirty-two".