22501539 has 6 divisors (see below), whose sum is σ = 32502236. Its totient is φ = 15001020.

The previous prime is 22501517. The next prime is 22501543. The reversal of 22501539 is 93510522.

It is not a de Polignac number, because 22501539 - 2⁹ = 22501027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22501139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1250077 + ... + 1250094.

Almost surely, 2^22501539 is an apocalyptic number.

22501539 is a deficient number, since it is larger than the sum of its proper divisors (10000697).

22501539 is a wasteful number, since it uses less digits than its factorization.

22501539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500177 (or 2500174 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 22501539 is about 4743.5787123226. The cubic root of 22501539 is about 282.3172452040.

The spelling of 22501539 in words is "twenty-two million, five hundred one thousand, five hundred thirty-nine".