23201539 has 2 divisors, whose sum is σ = 23201540. Its totient is φ = 23201538.

The previous prime is 23201513. The next prime is 23201543. The reversal of 23201539 is 93510232.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23201539 - 2¹⁹ = 22677251 is a prime.

It is a super-2 number, since 2×23201539² = 1076622823937042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23201509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600769 + 11600770.

It is an arithmetic number, because the mean of its divisors is an integer number (11600770).

Almost surely, 2^23201539 is an apocalyptic number.

23201539 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201539 is an equidigital number, since it uses as much as digits as its factorization.

23201539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 23201539 is about 4816.7975876094. The cubic root of 23201539 is about 285.2149358419.

The spelling of 23201539 in words is "twenty-three million, two hundred one thousand, five hundred thirty-nine".