22490545 has 16 divisors (see below), whose sum is σ = 33648768. Its totient is φ = 14019840.

The previous prime is 22490539. The next prime is 22490549. The reversal of 22490545 is 54509422.

It is not a de Polignac number, because 22490545 - 2³ = 22490537 is a prime.

It is a super-2 number, since 2×22490545² = 1011649228794050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22490549) 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, 28824 + ... + 29593.

It is an arithmetic number, because the mean of its divisors is an integer number (2103048).

Almost surely, 2^22490545 is an apocalyptic number.

It is an amenable number.

22490545 is a deficient number, since it is larger than the sum of its proper divisors (11158223).

22490545 is a wasteful number, since it uses less digits than its factorization.

22490545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58440.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 22490545 is about 4742.4197410183. The cubic root of 22490545 is about 282.2712586987.

Adding to 22490545 its reverse (54509422), we get a palindrome (76999967).

The spelling of 22490545 in words is "twenty-two million, four hundred ninety thousand, five hundred forty-five".