23415139 has 4 divisors (see below), whose sum is σ = 25543800. Its totient is φ = 21286480.

The previous prime is 23415107. The next prime is 23415143. The reversal of 23415139 is 93151432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23415139 - 2⁵ = 23415107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23415149) 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, 1064314 + ... + 1064335.

It is an arithmetic number, because the mean of its divisors is an integer number (6385950).

Almost surely, 2^23415139 is an apocalyptic number.

23415139 is a deficient number, since it is larger than the sum of its proper divisors (2128661).

23415139 is a wasteful number, since it uses less digits than its factorization.

23415139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128660.

The product of its digits is 3240, while the sum is 28.

The square root of 23415139 is about 4838.9191975068. The cubic root of 23415139 is about 286.0875202831.

The spelling of 23415139 in words is "twenty-three million, four hundred fifteen thousand, one hundred thirty-nine".