22542539 has 2 divisors, whose sum is σ = 22542540. Its totient is φ = 22542538.

The previous prime is 22542479. The next prime is 22542547. The reversal of 22542539 is 93524522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22542539 - 2¹² = 22538443 is a prime.

It is not a weakly prime, because it can be changed into another prime (22542739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11271269 + 11271270.

It is an arithmetic number, because the mean of its divisors is an integer number (11271270).

Almost surely, 2^22542539 is an apocalyptic number.

22542539 is a deficient number, since it is larger than the sum of its proper divisors (1).

22542539 is an equidigital number, since it uses as much as digits as its factorization.

22542539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 22542539 is about 4747.8983771770. The cubic root of 22542539 is about 282.4886110218.

The spelling of 22542539 in words is "twenty-two million, five hundred forty-two thousand, five hundred thirty-nine".