13625220 has 48 divisors (see below), whose sum is σ = 43602048. Its totient is φ = 3114240.

The previous prime is 13625219. The next prime is 13625233. The reversal of 13625220 is 2252631.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15801 + ... + 16640.

It is an arithmetic number, because the mean of its divisors is an integer number (908376).

Almost surely, 2^13625220 is an apocalyptic number.

13625220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13625220 is an abundant number, since it is smaller than the sum of its proper divisors (29976828).

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

13625220 is a wasteful number, since it uses less digits than its factorization.

13625220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32460 (or 32458 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13625220 is about 3691.2355654984. The cubic root of 13625220 is about 238.8440945596.

Adding to 13625220 its reverse (2252631), we get a palindrome (15877851).

The spelling of 13625220 in words is "thirteen million, six hundred twenty-five thousand, two hundred twenty".