22013212525 has 12 divisors (see below), whose sum is σ = 27931184512. Its totient is φ = 17201021040.

The previous prime is 22013212511. The next prime is 22013212541. The reversal of 22013212525 is 52521231022.

It is not a de Polignac number, because 22013212525 - 2¹¹ = 22013210477 is a prime.

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 22013212525.

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, 10237629 + ... + 10239778.

Almost surely, 2^22013212525 is an apocalyptic number.

22013212525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22013212525 is a deficient number, since it is larger than the sum of its proper divisors (5917971987).

22013212525 is a wasteful number, since it uses less digits than its factorization.

22013212525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20477460 (or 20477455 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 22013212525 its reverse (52521231022), we get a palindrome (74534443547).

The spelling of 22013212525 in words is "twenty-two billion, thirteen million, two hundred twelve thousand, five hundred twenty-five".