23197513 has 4 divisors (see below), whose sum is σ = 23763348. Its totient is φ = 22631680.

The previous prime is 23197487. The next prime is 23197519. The reversal of 23197513 is 31579132.

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 13630864 + 9566649 = 3692^2 + 3093^2 .

It is a cyclic number.

It is not a de Polignac number, because 23197513 - 2⁹ = 23197001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23197519) 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, 282856 + ... + 282937.

It is an arithmetic number, because the mean of its divisors is an integer number (5940837).

Almost surely, 2^23197513 is an apocalyptic number.

It is an amenable number.

23197513 is a deficient number, since it is larger than the sum of its proper divisors (565835).

23197513 is an equidigital number, since it uses as much as digits as its factorization.

23197513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565834.

The product of its digits is 5670, while the sum is 31.

The square root of 23197513 is about 4816.3796569623. The cubic root of 23197513 is about 285.1984377732.

The spelling of 23197513 in words is "twenty-three million, one hundred ninety-seven thousand, five hundred thirteen".