23612521 has 2 divisors, whose sum is σ = 23612522. Its totient is φ = 23612520.

The previous prime is 23612509. The next prime is 23612527. The reversal of 23612521 is 12521632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23386896 + 225625 = 4836^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 23612521 - 2⁵ = 23612489 is a prime.

It is a super-2 number, since 2×23612521² = 1115102295950882, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 23612492 and 23612501.

It is not a weakly prime, because it can be changed into another prime (23612527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11806260 + 11806261.

It is an arithmetic number, because the mean of its divisors is an integer number (11806261).

Almost surely, 2^23612521 is an apocalyptic number.

It is an amenable number.

23612521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23612521 is an equidigital number, since it uses as much as digits as its factorization.

23612521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 23612521 is about 4859.2716532419. The cubic root of 23612521 is about 286.8891468920.

The spelling of 23612521 in words is "twenty-three million, six hundred twelve thousand, five hundred twenty-one".