22012825 has 6 divisors (see below), whose sum is σ = 27295934. Its totient is φ = 17610240.

The previous prime is 22012819. The next prime is 22012829. The reversal of 22012825 is 52821022.

It can be written as a sum of positive squares in 3 ways, for example, as 594441 + 21418384 = 771^2 + 4628^2 .

It is not a de Polignac number, because 22012825 - 2²³ = 13624217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012796 and 22012805.

It is not an unprimeable number, because it can be changed into a prime (22012829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 440232 + ... + 440281.

Almost surely, 2^22012825 is an apocalyptic number.

22012825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22012825 is a deficient number, since it is larger than the sum of its proper divisors (5283109).

22012825 is an equidigital number, since it uses as much as digits as its factorization.

22012825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880523 (or 880518 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 22012825 is about 4691.7827102286. The cubic root of 22012825 is about 280.2583712074.

Adding to 22012825 its reverse (52821022), we get a palindrome (74833847).

It can be divided in two parts, 220 and 12825, that multiplied together give a triangular number (2821500 = T₂₃₇₅).

The spelling of 22012825 in words is "twenty-two million, twelve thousand, eight hundred twenty-five".