25532323220 has 36 divisors (see below), whose sum is σ = 53714622612. Its totient is φ = 10194528000.

The previous prime is 25532323211. The next prime is 25532323247. The reversal of 25532323220 is 2232323552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2874246544 + 22658076676 = 53612^2 + 150526^2 .

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, 21258620 + ... + 21259820.

Almost surely, 2^25532323220 is an apocalyptic number.

25532323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25532323220 is an abundant number, since it is smaller than the sum of its proper divisors (28182299392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25532323220 is a wasteful number, since it uses less digits than its factorization.

25532323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272 (or 2239 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 29.

Adding to 25532323220 its reverse (2232323552), we get a palindrome (27764646772).

The spelling of 25532323220 in words is "twenty-five billion, five hundred thirty-two million, three hundred twenty-three thousand, two hundred twenty".