23131361 has 4 divisors (see below), whose sum is σ = 25234224. Its totient is φ = 21028500.

The previous prime is 23131351. The next prime is 23131369. The reversal of 23131361 is 16313132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131361 is a prime.

It is a super-3 number, since 3×23131361³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131369) 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, 1051415 + ... + 1051436.

It is an arithmetic number, because the mean of its divisors is an integer number (6308556).

Almost surely, 2^23131361 is an apocalyptic number.

It is an amenable number.

23131361 is a deficient number, since it is larger than the sum of its proper divisors (2102863).

23131361 is a wasteful number, since it uses less digits than its factorization.

23131361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102862.

The product of its digits is 324, while the sum is 20.

The square root of 23131361 is about 4809.5073552288. The cubic root of 23131361 is about 284.9270809652.

Adding to 23131361 its reverse (16313132), we get a palindrome (39444493).

The spelling of 23131361 in words is "twenty-three million, one hundred thirty-one thousand, three hundred sixty-one".