22161559 has 16 divisors (see below), whose sum is σ = 26521600. Its totient is φ = 18118080.

The previous prime is 22161551. The next prime is 22161563. The reversal of 22161559 is 95516122.

It is a cyclic number.

It is not a de Polignac number, because 22161559 - 2³ = 22161551 is a prime.

It is a super-2 number, since 2×22161559² = 982269394620962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 22161559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22161551) 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 in 15 ways as a sum of consecutive naturals, for example, 15142 + ... + 16540.

It is an arithmetic number, because the mean of its divisors is an integer number (1657600).

Almost surely, 2^22161559 is an apocalyptic number.

22161559 is a deficient number, since it is larger than the sum of its proper divisors (4360041).

22161559 is a wasteful number, since it uses less digits than its factorization.

22161559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510.

The product of its digits is 5400, while the sum is 31.

The square root of 22161559 is about 4707.6065043714. The cubic root of 22161559 is about 280.8881619084. Note that the first 3 decimals are identical.

The spelling of 22161559 in words is "twenty-two million, one hundred sixty-one thousand, five hundred fifty-nine".