22513290 has 64 divisors (see below), whose sum is σ = 57507840. Its totient is φ = 5624640.

The previous prime is 22513259. The next prime is 22513291. The reversal of 22513290 is 9231522.

It is a super-3 number, since 3×22513290³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22513290.

It is not an unprimeable number, because it can be changed into a prime (22513291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72235 + ... + 72545.

It is an arithmetic number, because the mean of its divisors is an integer number (898560).

Almost surely, 2^22513290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22513290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28753920).

22513290 is an abundant number, since it is smaller than the sum of its proper divisors (34994550).

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

22513290 is a wasteful number, since it uses less digits than its factorization.

22513290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 22513290 is about 4744.8171724525. The cubic root of 22513290 is about 282.3663815855.

The spelling of 22513290 in words is "twenty-two million, five hundred thirteen thousand, two hundred ninety".