23145857 has 32 divisors (see below), whose sum is σ = 30585600. Its totient is φ = 17031168.

The previous prime is 23145827. The next prime is 23145883. The reversal of 23145857 is 75854132.

It is a happy number.

It is not a de Polignac number, because 23145857 - 2¹⁰ = 23144833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23145817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65393 + ... + 65745.

It is an arithmetic number, because the mean of its divisors is an integer number (955800).

Almost surely, 2^23145857 is an apocalyptic number.

It is an amenable number.

23145857 is a deficient number, since it is larger than the sum of its proper divisors (7439743).

23145857 is a wasteful number, since it uses less digits than its factorization.

23145857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425.

The product of its digits is 33600, while the sum is 35.

The square root of 23145857 is about 4811.0141342549. The cubic root of 23145857 is about 284.9865880628.

Adding to 23145857 its reverse (75854132), we get a palindrome (98999989).

The spelling of 23145857 in words is "twenty-three million, one hundred forty-five thousand, eight hundred fifty-seven".