13345551 has 12 divisors (see below), whose sum is σ = 19476912. Its totient is φ = 8804736.

The previous prime is 13345513. The next prime is 13345571. The reversal of 13345551 is 15554331.

It is not a de Polignac number, because 13345551 - 2¹⁷ = 13214479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13345511) 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 11 ways as a sum of consecutive naturals, for example, 6771 + ... + 8516.

It is an arithmetic number, because the mean of its divisors is an integer number (1623076).

Almost surely, 2^13345551 is an apocalyptic number.

13345551 is a deficient number, since it is larger than the sum of its proper divisors (6131361).

13345551 is a wasteful number, since it uses less digits than its factorization.

13345551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15390 (or 15387 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 13345551 is about 3653.1563065382. The cubic root of 13345551 is about 237.1986264159.

Adding to 13345551 its reverse (15554331), we get a palindrome (28899882).

It can be divided in two parts, 133455 and 51, that multiplied together give a triangular number (6806205 = T₃₆₈₉).

The spelling of 13345551 in words is "thirteen million, three hundred forty-five thousand, five hundred fifty-one".