23372161 has 4 divisors (see below), whose sum is σ = 24747012. Its totient is φ = 21997312.

The previous prime is 23372159. The next prime is 23372179. The reversal of 23372161 is 16127332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20875761 + 2496400 = 4569^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 23372161 - 2¹ = 23372159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23372131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687400 + ... + 687433.

It is an arithmetic number, because the mean of its divisors is an integer number (6186753).

Almost surely, 2^23372161 is an apocalyptic number.

It is an amenable number.

23372161 is a deficient number, since it is larger than the sum of its proper divisors (1374851).

23372161 is a wasteful number, since it uses less digits than its factorization.

23372161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374850.

The product of its digits is 1512, while the sum is 25.

The square root of 23372161 is about 4834.4762901477. The cubic root of 23372161 is about 285.9123771870.

Adding to 23372161 its reverse (16127332), we get a palindrome (39499493).

The spelling of 23372161 in words is "twenty-three million, three hundred seventy-two thousand, one hundred sixty-one".