23115139 has 2 divisors, whose sum is σ = 23115140. Its totient is φ = 23115138.

The previous prime is 23115137. The next prime is 23115149. The reversal of 23115139 is 93151132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23115139 - 2¹ = 23115137 is a prime.

Together with 23115137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23115133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11557569 + 11557570.

It is an arithmetic number, because the mean of its divisors is an integer number (11557570).

Almost surely, 2^23115139 is an apocalyptic number.

23115139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23115139 is an equidigital number, since it uses as much as digits as its factorization.

23115139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 25.

The square root of 23115139 is about 4807.8206081342. The cubic root of 23115139 is about 284.8604590312.

The spelling of 23115139 in words is "twenty-three million, one hundred fifteen thousand, one hundred thirty-nine".