23121164 has 72 divisors (see below), whose sum is σ = 48620544. Its totient is φ = 9583200.

The previous prime is 23121127. The next prime is 23121181. The reversal of 23121164 is 46112132.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345059 + ... + 345125.

Almost surely, 2^23121164 is an apocalyptic number.

It is an amenable number.

23121164 is an abundant number, since it is smaller than the sum of its proper divisors (25499380).

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

23121164 is a wasteful number, since it uses less digits than its factorization.

23121164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 134 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 23121164 is about 4808.4471505882. The cubic root of 23121164 is about 284.8852066677.

Adding to 23121164 its reverse (46112132), we get a palindrome (69233296).

It can be divided in two parts, 231 and 21164, that multiplied together give a palindrome (4888884).

The spelling of 23121164 in words is "twenty-three million, one hundred twenty-one thousand, one hundred sixty-four".