13445031 has 4 divisors (see below), whose sum is σ = 17926712. Its totient is φ = 8963352.

The previous prime is 13445021. The next prime is 13445039. The reversal of 13445031 is 13054431.

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

It is not a de Polignac number, because 13445031 - 2⁵ = 13444999 is a prime.

It is a super-2 number, since 2×13445031² = 361537717181922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13444989 and 13445007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13445039) 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, 2240836 + ... + 2240841.

It is an arithmetic number, because the mean of its divisors is an integer number (4481678).

Almost surely, 2^13445031 is an apocalyptic number.

13445031 is a deficient number, since it is larger than the sum of its proper divisors (4481681).

13445031 is an equidigital number, since it uses as much as digits as its factorization.

13445031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481680.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13445031 is about 3666.7466506428. The cubic root of 13445031 is about 237.7865409486.

Adding to 13445031 its reverse (13054431), we get a palindrome (26499462).

The spelling of 13445031 in words is "thirteen million, four hundred forty-five thousand, thirty-one".