13231807 has 4 divisors (see below), whose sum is σ = 13554576. Its totient is φ = 12909040.

The previous prime is 13231787. The next prime is 13231811. The reversal of 13231807 is 70813231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70813231 = 163 ⋅434437.

It is a cyclic number.

It is not a de Polignac number, because 13231807 - 2⁷ = 13231679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13238807) 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, 161323 + ... + 161404.

It is an arithmetic number, because the mean of its divisors is an integer number (3388644).

Almost surely, 2^13231807 is an apocalyptic number.

13231807 is a deficient number, since it is larger than the sum of its proper divisors (322769).

13231807 is an equidigital number, since it uses as much as digits as its factorization.

13231807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322768.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13231807 is about 3637.5550854936. Note that the first 3 decimals coincide. The cubic root of 13231807 is about 236.5228222861.

The spelling of 13231807 in words is "thirteen million, two hundred thirty-one thousand, eight hundred seven".