23403131 has 2 divisors, whose sum is σ = 23403132. Its totient is φ = 23403130.

The previous prime is 23403097. The next prime is 23403151. The reversal of 23403131 is 13130432.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23403131 - 2¹⁰ = 23402107 is a prime.

It is a super-2 number, since 2×23403131² = 1095413081206322, which contains 22 as substring.

It is equal to p_1472003 and since 23403131 and 1472003 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23403151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11701565 + 11701566.

It is an arithmetic number, because the mean of its divisors is an integer number (11701566).

Almost surely, 2^23403131 is an apocalyptic number.

23403131 is a deficient number, since it is larger than the sum of its proper divisors (1).

23403131 is an equidigital number, since it uses as much as digits as its factorization.

23403131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 23403131 is about 4837.6782654492. The cubic root of 23403131 is about 286.0386071083.

Adding to 23403131 its reverse (13130432), we get a palindrome (36533563).

The spelling of 23403131 in words is "twenty-three million, four hundred three thousand, one hundred thirty-one".