13425531 has 8 divisors (see below), whose sum is σ = 20457984. Its totient is φ = 7671720.

The previous prime is 13425481. The next prime is 13425539. The reversal of 13425531 is 13552431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13425531 - 2⁷ = 13425403 is a prime.

It is a super-2 number, since 2×13425531² = 360489765263922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13425539) 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, 319635 + ... + 319676.

It is an arithmetic number, because the mean of its divisors is an integer number (2557248).

Almost surely, 2^13425531 is an apocalyptic number.

13425531 is a deficient number, since it is larger than the sum of its proper divisors (7032453).

13425531 is an equidigital number, since it uses as much as digits as its factorization.

13425531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639321.

The product of its digits is 1800, while the sum is 24.

The square root of 13425531 is about 3664.0866529055. The cubic root of 13425531 is about 237.6715274284.

Adding to 13425531 its reverse (13552431), we get a palindrome (26977962).

The spelling of 13425531 in words is "thirteen million, four hundred twenty-five thousand, five hundred thirty-one".