13225531 has 4 divisors (see below), whose sum is σ = 14427864. Its totient is φ = 12023200.

The previous prime is 13225517. The next prime is 13225549. The reversal of 13225531 is 13552231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13225531 - 2⁷ = 13225403 is a prime.

It is a super-2 number, since 2×13225531² = 349829340463922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13225591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601150 + ... + 601171.

It is an arithmetic number, because the mean of its divisors is an integer number (3606966).

Almost surely, 2^13225531 is an apocalyptic number.

13225531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13225531 is a deficient number, since it is larger than the sum of its proper divisors (1202333).

13225531 is a wasteful number, since it uses less digits than its factorization.

13225531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202332.

The product of its digits is 900, while the sum is 22.

The square root of 13225531 is about 3636.6923158277. The cubic root of 13225531 is about 236.4854211968.

Adding to 13225531 its reverse (13552231), we get a palindrome (26777762).

The spelling of 13225531 in words is "thirteen million, two hundred twenty-five thousand, five hundred thirty-one".