23131261 has 8 divisors (see below), whose sum is σ = 24534144. Its totient is φ = 21761520.

The previous prime is 23131249. The next prime is 23131289. The reversal of 23131261 is 16213132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23131261 - 2¹⁷ = 23000189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6841 + ... + 9646.

It is an arithmetic number, because the mean of its divisors is an integer number (3066768).

Almost surely, 2^23131261 is an apocalyptic number.

It is an amenable number.

23131261 is a deficient number, since it is larger than the sum of its proper divisors (1402883).

23131261 is a wasteful number, since it uses less digits than its factorization.

23131261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16571.

The product of its digits is 216, while the sum is 19.

The square root of 23131261 is about 4809.4969591424. The cubic root of 23131261 is about 284.9266703718.

Adding to 23131261 its reverse (16213132), we get a palindrome (39344393).

The spelling of 23131261 in words is "twenty-three million, one hundred thirty-one thousand, two hundred sixty-one".