23512513 has 4 divisors (see below), whose sum is σ = 24895620. Its totient is φ = 22129408.

The previous prime is 23512507. The next prime is 23512523. The reversal of 23512513 is 31521532.

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 17909824 + 5602689 = 4232^2 + 2367^2 .

It is a cyclic number.

It is not a de Polignac number, because 23512513 - 2¹⁷ = 23381441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23512523) 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, 691528 + ... + 691561.

It is an arithmetic number, because the mean of its divisors is an integer number (6223905).

Almost surely, 2^23512513 is an apocalyptic number.

It is an amenable number.

23512513 is a deficient number, since it is larger than the sum of its proper divisors (1383107).

23512513 is a wasteful number, since it uses less digits than its factorization.

23512513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383106.

The product of its digits is 900, while the sum is 22.

The square root of 23512513 is about 4848.9703030644. The cubic root of 23512513 is about 286.4835455383.

It can be divided in two parts, 23512 and 513, that added together give a square (24025 = 155²).

The spelling of 23512513 in words is "twenty-three million, five hundred twelve thousand, five hundred thirteen".