13557851 has 4 divisors (see below), whose sum is σ = 13641192. Its totient is φ = 13474512.

The previous prime is 13557827. The next prime is 13557883. The reversal of 13557851 is 15875531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15875531 = 7 ⋅2267933.

It is a cyclic number.

It is not a de Polignac number, because 13557851 - 2¹⁴ = 13541467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13557821) 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, 41426 + ... + 41751.

It is an arithmetic number, because the mean of its divisors is an integer number (3410298).

Almost surely, 2^13557851 is an apocalyptic number.

13557851 is a deficient number, since it is larger than the sum of its proper divisors (83341).

13557851 is an equidigital number, since it uses as much as digits as its factorization.

13557851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83340.

The product of its digits is 21000, while the sum is 35.

The square root of 13557851 is about 3682.0987221964. The cubic root of 13557851 is about 238.4497943655.

The spelling of 13557851 in words is "thirteen million, five hundred fifty-seven thousand, eight hundred fifty-one".