13187157 has 4 divisors (see below), whose sum is σ = 17582880. Its totient is φ = 8791436.

The previous prime is 13187143. The next prime is 13187171. The reversal of 13187157 is 75178131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (13187143) and next prime (13187171).

It is a cyclic number.

It is not a de Polignac number, because 13187157 - 2⁶ = 13187093 is a prime.

It is a super-2 number, since 2×13187157² = 347802219485298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13187107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2197857 + ... + 2197862.

It is an arithmetic number, because the mean of its divisors is an integer number (4395720).

Almost surely, 2^13187157 is an apocalyptic number.

It is an amenable number.

13187157 is a deficient number, since it is larger than the sum of its proper divisors (4395723).

13187157 is an equidigital number, since it uses as much as digits as its factorization.

13187157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395722.

The product of its digits is 5880, while the sum is 33.

The square root of 13187157 is about 3631.4125350888. The cubic root of 13187157 is about 236.2564780845.

The spelling of 13187157 in words is "thirteen million, one hundred eighty-seven thousand, one hundred fifty-seven".