13423531 has 8 divisors (see below), whose sum is σ = 14689584. Its totient is φ = 12165120.

The previous prime is 13423511. The next prime is 13423537. The reversal of 13423531 is 13532431.

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

It is not a de Polignac number, because 13423531 - 2⁵ = 13423499 is a prime.

It is a super-2 number, since 2×13423531² = 360382369015922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13423537) 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, 2155 + ... + 5611.

It is an arithmetic number, because the mean of its divisors is an integer number (1836198).

Almost surely, 2^13423531 is an apocalyptic number.

13423531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13423531 is a deficient number, since it is larger than the sum of its proper divisors (1266053).

13423531 is a wasteful number, since it uses less digits than its factorization.

13423531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821.

The product of its digits is 1080, while the sum is 22.

The square root of 13423531 is about 3663.8137234308. The cubic root of 13423531 is about 237.6597248745.

Adding to 13423531 its reverse (13532431), we get a palindrome (26955962).

Subtracting 13423531 from its reverse (13532431), we obtain a square (108900 = 330²).

The spelling of 13423531 in words is "thirteen million, four hundred twenty-three thousand, five hundred thirty-one".