22165539 has 16 divisors (see below), whose sum is σ = 32607360. Its totient is φ = 13280960.

The previous prime is 22165513. The next prime is 22165547. The reversal of 22165539 is 93556122.

It is not a de Polignac number, because 22165539 - 2⁷ = 22165411 is a prime.

It is a super-2 number, since 2×22165539² = 982622238321042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (22165579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 837 + ... + 6710.

It is an arithmetic number, because the mean of its divisors is an integer number (2037960).

Almost surely, 2^22165539 is an apocalyptic number.

22165539 is a deficient number, since it is larger than the sum of its proper divisors (10441821).

22165539 is a wasteful number, since it uses less digits than its factorization.

22165539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650.

The product of its digits is 16200, while the sum is 33.

The square root of 22165539 is about 4708.0292055169. The cubic root of 22165539 is about 280.9049758274.

It can be divided in two parts, 22 and 165539, that added together give a palindrome (165561).

The spelling of 22165539 in words is "twenty-two million, one hundred sixty-five thousand, five hundred thirty-nine".