22140612 has 36 divisors (see below), whose sum is σ = 60272940. Its totient is φ = 6812352.

The previous prime is 22140581. The next prime is 22140617. The reversal of 22140612 is 21604122.

It can be written as a sum of positive squares in 2 ways, for example, as 2903616 + 19236996 = 1704^2 + 4386^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22140617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23187 + ... + 24122.

Almost surely, 2^22140612 is an apocalyptic number.

It is an amenable number.

22140612 is an abundant number, since it is smaller than the sum of its proper divisors (38132328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22140612 is a wasteful number, since it uses less digits than its factorization.

22140612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47332 (or 47327 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22140612 is about 4705.3811747828. The cubic root of 22140612 is about 280.7996359603.

Adding to 22140612 its reverse (21604122), we get a palindrome (43744734).

The spelling of 22140612 in words is "twenty-two million, one hundred forty thousand, six hundred twelve".