13225491 has 8 divisors (see below), whose sum is σ = 19593360. Its totient is φ = 8816976.

The previous prime is 13225453. The next prime is 13225517. The reversal of 13225491 is 19452231.

13225491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13225491 - 2⁶ = 13225427 is a prime.

It is a super-2 number, since 2×13225491² = 349827224382162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 489833 = 13225491 / (1 + 3 + 2 + 2 + 5 + 4 + 9 + 1).

It is not an unprimeable number, because it can be changed into a prime (13225451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244890 + ... + 244943.

It is an arithmetic number, because the mean of its divisors is an integer number (2449170).

Almost surely, 2^13225491 is an apocalyptic number.

13225491 is a deficient number, since it is larger than the sum of its proper divisors (6367869).

13225491 is an equidigital number, since it uses as much as digits as its factorization.

13225491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489842 (or 489836 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 13225491 is about 3636.6868163206. The cubic root of 13225491 is about 236.4851827835.

The spelling of 13225491 in words is "thirteen million, two hundred twenty-five thousand, four hundred ninety-one".