22540661 has 8 divisors (see below), whose sum is σ = 26481504. Its totient is φ = 18915120.

The previous prime is 22540649. The next prime is 22540711. The reversal of 22540661 is 16604522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22540661 - 2¹⁴ = 22524277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22540661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22540601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78671 + ... + 78956.

It is an arithmetic number, because the mean of its divisors is an integer number (3310188).

Almost surely, 2^22540661 is an apocalyptic number.

It is an amenable number.

22540661 is a deficient number, since it is larger than the sum of its proper divisors (3940843).

22540661 is a wasteful number, since it uses less digits than its factorization.

22540661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157651.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22540661 is about 4747.7006013438. The cubic root of 22540661 is about 282.4807661743.

The spelling of 22540661 in words is "twenty-two million, five hundred forty thousand, six hundred sixty-one".