22640325 has 24 divisors (see below), whose sum is σ = 37893408. Its totient is φ = 11926080.

The previous prime is 22640291. The next prime is 22640339. The reversal of 22640325 is 52304622.

It is not a de Polignac number, because 22640325 - 2¹³ = 22632133 is a prime.

It is a super-2 number, since 2×22640325² = 1025168632211250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22640295 and 22640304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4407 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (1578892).

Almost surely, 2^22640325 is an apocalyptic number.

22640325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22640325 is a deficient number, since it is larger than the sum of its proper divisors (15253083).

22640325 is a wasteful number, since it uses less digits than its factorization.

22640325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733 (or 3728 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 22640325 is about 4758.1850531479. The cubic root of 22640325 is about 282.8964855926.

Adding to 22640325 its reverse (52304622), we get a palindrome (74944947).

The spelling of 22640325 in words is "twenty-two million, six hundred forty thousand, three hundred twenty-five".