23391131 has 2 divisors, whose sum is σ = 23391132. Its totient is φ = 23391130.

The previous prime is 23391127. The next prime is 23391191. The reversal of 23391131 is 13119332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23391131 - 2² = 23391127 is a prime.

It is a super-2 number, since 2×23391131² = 1094290018918322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23391097 and 23391106.

It is not a weakly prime, because it can be changed into another prime (23391191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11695565 + 11695566.

It is an arithmetic number, because the mean of its divisors is an integer number (11695566).

Almost surely, 2^23391131 is an apocalyptic number.

23391131 is a deficient number, since it is larger than the sum of its proper divisors (1).

23391131 is an equidigital number, since it uses as much as digits as its factorization.

23391131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 23.

The square root of 23391131 is about 4836.4378420486. The cubic root of 23391131 is about 285.9897098030.

The spelling of 23391131 in words is "twenty-three million, three hundred ninety-one thousand, one hundred thirty-one".