22223725 has 12 divisors (see below), whose sum is σ = 27634516. Its totient is φ = 17729280.

The previous prime is 22223693. The next prime is 22223741. The reversal of 22223725 is 52732222.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2696164 + 19527561 = 1642^2 + 4419^2 .

It is not a de Polignac number, because 22223725 - 2⁵ = 22223693 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 22223725.

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, 9799 + ... + 11851.

Almost surely, 2^22223725 is an apocalyptic number.

22223725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22223725 is a deficient number, since it is larger than the sum of its proper divisors (5410791).

22223725 is a wasteful number, since it uses less digits than its factorization.

22223725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496 (or 2491 counting only the distinct ones).

The product of its digits is 3360, while the sum is 25.

The square root of 22223725 is about 4714.2045988693. The cubic root of 22223725 is about 281.1505590837.

Adding to 22223725 its reverse (52732222), we get a palindrome (74955947).

The spelling of 22223725 in words is "twenty-two million, two hundred twenty-three thousand, seven hundred twenty-five".