13445551 has 12 divisors (see below), whose sum is σ = 15706920. Its totient is φ = 11476080.

The previous prime is 13445543. The next prime is 13445557. The reversal of 13445551 is 15554431.

It is not a de Polignac number, because 13445551 - 2³ = 13445543 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 (13445557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15805 + ... + 16633.

It is an arithmetic number, because the mean of its divisors is an integer number (1308910).

Almost surely, 2^13445551 is an apocalyptic number.

13445551 is a deficient number, since it is larger than the sum of its proper divisors (2261369).

13445551 is an equidigital number, since it uses as much as digits as its factorization.

13445551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1167 counting only the distinct ones).

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

The square root of 13445551 is about 3666.8175575013. The cubic root of 13445551 is about 237.7896064531.

Adding to 13445551 its reverse (15554431), we get a palindrome (28999982).

The spelling of 13445551 in words is "thirteen million, four hundred forty-five thousand, five hundred fifty-one".