22640061 has 4 divisors (see below), whose sum is σ = 30186752. Its totient is φ = 15093372.

The previous prime is 22640053. The next prime is 22640083. The reversal of 22640061 is 16004622.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22640061 - 2³ = 22640053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3773341 + ... + 3773346.

It is an arithmetic number, because the mean of its divisors is an integer number (7546688).

Almost surely, 2^22640061 is an apocalyptic number.

It is an amenable number.

22640061 is a deficient number, since it is larger than the sum of its proper divisors (7546691).

22640061 is an equidigital number, since it uses as much as digits as its factorization.

22640061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7546690.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22640061 is about 4758.1573113969. The cubic root of 22640061 is about 282.8953860065.

Adding to 22640061 its reverse (16004622), we get a palindrome (38644683).

The spelling of 22640061 in words is "twenty-two million, six hundred forty thousand, sixty-one".