22513645 has 16 divisors (see below), whose sum is σ = 33683328. Its totient is φ = 14034240.

The previous prime is 22513609. The next prime is 22513663. The reversal of 22513645 is 54631522.

It is not a de Polignac number, because 22513645 - 2⁹ = 22513133 is a prime.

It is a super-3 number, since 3×22513645³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28854 + ... + 29623.

It is an arithmetic number, because the mean of its divisors is an integer number (2105208).

Almost surely, 2^22513645 is an apocalyptic number.

It is an amenable number.

22513645 is a deficient number, since it is larger than the sum of its proper divisors (11169683).

22513645 is a wasteful number, since it uses less digits than its factorization.

22513645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58500.

The product of its digits is 7200, while the sum is 28.

The square root of 22513645 is about 4744.8545815441. The cubic root of 22513645 is about 282.3678657391.

The spelling of 22513645 in words is "twenty-two million, five hundred thirteen thousand, six hundred forty-five".