22663531 has 8 divisors (see below), whose sum is σ = 24920064. Its totient is φ = 20439720.

The previous prime is 22663517. The next prime is 22663547. The reversal of 22663531 is 13536622.

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 22663531 - 2⁹ = 22663019 is a prime.

It is a super-2 number, since 2×22663531² = 1027271274775922, which contains 22 as substring.

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 22663531.

It is not an unprimeable number, because it can be changed into a prime (22663331) 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, 6715 + ... + 9508.

It is an arithmetic number, because the mean of its divisors is an integer number (3115008).

Almost surely, 2^22663531 is an apocalyptic number.

22663531 is a deficient number, since it is larger than the sum of its proper divisors (2256533).

22663531 is a wasteful number, since it uses less digits than its factorization.

22663531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16361.

The product of its digits is 6480, while the sum is 28.

The square root of 22663531 is about 4760.6229634366. The cubic root of 22663531 is about 282.9931074999.

Adding to 22663531 its product of digits (6480), we get a triangular number (22670011 = T₆₇₃₃).

The spelling of 22663531 in words is "twenty-two million, six hundred sixty-three thousand, five hundred thirty-one".