23150905 has 4 divisors (see below), whose sum is σ = 27781092. Its totient is φ = 18520720.

The previous prime is 23150887. The next prime is 23150921. The reversal of 23150905 is 50905132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8003241 + 15147664 = 2829^2 + 3892^2 .

It is not a de Polignac number, because 23150905 - 2¹¹ = 23148857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23150905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2315086 + ... + 2315095.

It is an arithmetic number, because the mean of its divisors is an integer number (6945273).

Almost surely, 2^23150905 is an apocalyptic number.

It is an amenable number.

23150905 is a deficient number, since it is larger than the sum of its proper divisors (4630187).

23150905 is an equidigital number, since it uses as much as digits as its factorization.

23150905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630186.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 23150905 is about 4811.5387351657. The cubic root of 23150905 is about 285.0073046245.

The spelling of 23150905 in words is "twenty-three million, one hundred fifty thousand, nine hundred five".