23150513 has 4 divisors (see below), whose sum is σ = 23379828. Its totient is φ = 22921200.

The previous prime is 23150509. The next prime is 23150539. The reversal of 23150513 is 31505132.

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 22591009 + 559504 = 4753^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 23150513 - 2² = 23150509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23150593) 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, 114506 + ... + 114707.

It is an arithmetic number, because the mean of its divisors is an integer number (5844957).

Almost surely, 2^23150513 is an apocalyptic number.

It is an amenable number.

23150513 is a deficient number, since it is larger than the sum of its proper divisors (229315).

23150513 is a wasteful number, since it uses less digits than its factorization.

23150513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229314.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 23150513 is about 4811.4979995839. The cubic root of 23150513 is about 285.0056959978.

Adding to 23150513 its reverse (31505132), we get a palindrome (54655645).

The spelling of 23150513 in words is "twenty-three million, one hundred fifty thousand, five hundred thirteen".