25212213325 has 24 divisors (see below), whose sum is σ = 34015137128. Its totient is φ = 18426286080.

The previous prime is 25212213311. The next prime is 25212213329. The reversal of 25212213325 is 52331221252.

It can be written as a sum of positive squares in 12 ways, for example, as 4125107529 + 21087105796 = 64227^2 + 145214^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25212213325 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25212213293 and 25212213302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25212213329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 368352 + ... + 431401.

Almost surely, 2^25212213325 is an apocalyptic number.

25212213325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25212213325 is a deficient number, since it is larger than the sum of its proper divisors (8802923803).

25212213325 is a wasteful number, since it uses less digits than its factorization.

25212213325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799873 (or 799868 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

Adding to 25212213325 its reverse (52331221252), we get a palindrome (77543434577).

The spelling of 25212213325 in words is "twenty-five billion, two hundred twelve million, two hundred thirteen thousand, three hundred twenty-five".