13525551 has 12 divisors (see below), whose sum is σ = 21039928. Its totient is φ = 8323344.

The previous prime is 13525543. The next prime is 13525553. The reversal of 13525551 is 15552531.

It is not a de Polignac number, because 13525551 - 2³ = 13525543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13525553) 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, 57685 + ... + 57918.

Almost surely, 2^13525551 is an apocalyptic number.

13525551 is a deficient number, since it is larger than the sum of its proper divisors (7514377).

13525551 is a wasteful number, since it uses less digits than its factorization.

13525551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115622 (or 115619 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 13525551 is about 3677.7100211953. The cubic root of 13525551 is about 238.2602841748.

It can be divided in two parts, 1352 and 5551, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 13525551 in words is "thirteen million, five hundred twenty-five thousand, five hundred fifty-one".