22143725 has 12 divisors (see below), whose sum is σ = 27602400. Its totient is φ = 17622000.

The previous prime is 22143689. The next prime is 22143743. The reversal of 22143725 is 52734122.

It is not a de Polignac number, because 22143725 - 2¹⁸ = 21881581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22143694 and 22143703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2750 + ... + 7200.

It is an arithmetic number, because the mean of its divisors is an integer number (2300200).

Almost surely, 2^22143725 is an apocalyptic number.

22143725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22143725 is a deficient number, since it is larger than the sum of its proper divisors (5458675).

22143725 is a wasteful number, since it uses less digits than its factorization.

22143725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660 (or 4655 counting only the distinct ones).

The product of its digits is 3360, while the sum is 26.

The square root of 22143725 is about 4705.7119546356. The cubic root of 22143725 is about 280.8127956131.

Adding to 22143725 its reverse (52734122), we get a palindrome (74877847).

The spelling of 22143725 in words is "twenty-two million, one hundred forty-three thousand, seven hundred twenty-five".