22731025 has 6 divisors (see below), whose sum is σ = 28186502. Its totient is φ = 18184800.

The previous prime is 22731019. The next prime is 22731043. The reversal of 22731025 is 52013722.

It can be written as a sum of positive squares in 3 ways, for example, as 82944 + 22648081 = 288^2 + 4759^2 .

It is not a de Polignac number, because 22731025 - 2¹¹ = 22728977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22730987 and 22731005.

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, 454596 + ... + 454645.

Almost surely, 2^22731025 is an apocalyptic number.

22731025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22731025 is a deficient number, since it is larger than the sum of its proper divisors (5455477).

22731025 is an equidigital number, since it uses as much as digits as its factorization.

22731025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909251 (or 909246 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 22731025 is about 4767.7064716696. The cubic root of 22731025 is about 283.2737552547.

Adding to 22731025 its reverse (52013722), we get a palindrome (74744747).

The spelling of 22731025 in words is "twenty-two million, seven hundred thirty-one thousand, twenty-five".