13225720 has 16 divisors (see below), whose sum is σ = 29757960. Its totient is φ = 5290272.

The previous prime is 13225717. The next prime is 13225741. The reversal of 13225720 is 2752231.

It is a junction number, because it is equal to n+sod(n) for n = 13225691 and 13225700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165282 + ... + 165361.

Almost surely, 2^13225720 is an apocalyptic number.

13225720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13225720 is an abundant number, since it is smaller than the sum of its proper divisors (16532240).

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

13225720 is a wasteful number, since it uses less digits than its factorization.

13225720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330654 (or 330650 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 13225720 is about 3636.7183008861. The cubic root of 13225720 is about 236.4865476930.

Adding to 13225720 its reverse (2752231), we get a palindrome (15977951).

It can be divided in two parts, 132 and 25720, that added together give a palindrome (25852).

The spelling of 13225720 in words is "thirteen million, two hundred twenty-five thousand, seven hundred twenty".