22100725 has 6 divisors (see below), whose sum is σ = 27404930. Its totient is φ = 17680560.

The previous prime is 22100713. The next prime is 22100761. The reversal of 22100725 is 52700122.

It can be written as a sum of positive squares in 3 ways, for example, as 142129 + 21958596 = 377^2 + 4686^2 .

It is not a de Polignac number, because 22100725 - 2⁵ = 22100693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 441990 + ... + 442039.

Almost surely, 2^22100725 is an apocalyptic number.

22100725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22100725 is a deficient number, since it is larger than the sum of its proper divisors (5304205).

22100725 is an equidigital number, since it uses as much as digits as its factorization.

22100725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884039 (or 884034 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 22100725 is about 4701.1408189928. The cubic root of 22100725 is about 280.6309115112.

Adding to 22100725 its reverse (52700122), we get a palindrome (74800847).

The spelling of 22100725 in words is "twenty-two million, one hundred thousand, seven hundred twenty-five".