13625551 has 4 divisors (see below), whose sum is σ = 14427072. Its totient is φ = 12824032.

The previous prime is 13625543. The next prime is 13625569. The reversal of 13625551 is 15552631.

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

It is a cyclic number.

It is not a de Polignac number, because 13625551 - 2³ = 13625543 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 (13625501) 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, 400735 + ... + 400768.

It is an arithmetic number, because the mean of its divisors is an integer number (3606768).

Almost surely, 2^13625551 is an apocalyptic number.

13625551 is a deficient number, since it is larger than the sum of its proper divisors (801521).

13625551 is an equidigital number, since it uses as much as digits as its factorization.

13625551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801520.

The product of its digits is 4500, while the sum is 28.

The square root of 13625551 is about 3691.2804011616. The cubic root of 13625551 is about 238.8460286386.

The spelling of 13625551 in words is "thirteen million, six hundred twenty-five thousand, five hundred fifty-one".