13551445 has 4 divisors (see below), whose sum is σ = 16261740. Its totient is φ = 10841152.

The previous prime is 13551437. The next prime is 13551449. The reversal of 13551445 is 54415531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4028049 + 9523396 = 2007^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 13551445 - 2³ = 13551437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13551449) 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, 1355140 + ... + 1355149.

It is an arithmetic number, because the mean of its divisors is an integer number (4065435).

Almost surely, 2^13551445 is an apocalyptic number.

It is an amenable number.

13551445 is a deficient number, since it is larger than the sum of its proper divisors (2710295).

13551445 is an equidigital number, since it uses as much as digits as its factorization.

13551445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710294.

The product of its digits is 6000, while the sum is 28.

The square root of 13551445 is about 3681.2287350829. The cubic root of 13551445 is about 238.4122331024.

Adding to 13551445 its reverse (54415531), we get a palindrome (67966976).

The spelling of 13551445 in words is "thirteen million, five hundred fifty-one thousand, four hundred forty-five".