22013525 has 6 divisors (see below), whose sum is σ = 27296802. Its totient is φ = 17610800.

The previous prime is 22013491. The next prime is 22013539. The reversal of 22013525 is 52531022.

It can be written as a sum of positive squares in 3 ways, for example, as 3290596 + 18722929 = 1814^2 + 4327^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22013525 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22013497 and 22013506.

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, 440246 + ... + 440295.

It is an arithmetic number, because the mean of its divisors is an integer number (4549467).

Almost surely, 2^22013525 is an apocalyptic number.

22013525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22013525 is a deficient number, since it is larger than the sum of its proper divisors (5283277).

22013525 is an equidigital number, since it uses as much as digits as its factorization.

22013525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880551 (or 880546 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 22013525 is about 4691.8573081457. The cubic root of 22013525 is about 280.2613418814.

Adding to 22013525 its reverse (52531022), we get a palindrome (74544547).

The spelling of 22013525 in words is "twenty-two million, thirteen thousand, five hundred twenty-five".