13551001 has 4 divisors (see below), whose sum is σ = 13558372. Its totient is φ = 13543632.

The previous prime is 13550983. The next prime is 13551007. The reversal of 13551001 is 10015531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10015531 = 1013 ⋅9887.

It can be written as a sum of positive squares in 2 ways, for example, as 13249600 + 301401 = 3640^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 13551001 - 2⁵ = 13550969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13551007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1591 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (3389593).

Almost surely, 2^13551001 is an apocalyptic number.

It is an amenable number.

13551001 is a deficient number, since it is larger than the sum of its proper divisors (7371).

13551001 is an equidigital number, since it uses as much as digits as its factorization.

13551001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 13551001 is about 3681.1684286378. The cubic root of 13551001 is about 238.4096292918.

Adding to 13551001 its reverse (10015531), we get a palindrome (23566532).

The spelling of 13551001 in words is "thirteen million, five hundred fifty-one thousand, one".