13711531 has 2 divisors, whose sum is σ = 13711532. Its totient is φ = 13711530.

The previous prime is 13711499. The next prime is 13711543. The reversal of 13711531 is 13511731.

13711531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13511731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13711531 - 2⁵ = 13711499 is a prime.

It is a super-2 number, since 2×13711531² = 376012164727922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13711561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6855765 + 6855766.

It is an arithmetic number, because the mean of its divisors is an integer number (6855766).

Almost surely, 2^13711531 is an apocalyptic number.

13711531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13711531 is an equidigital number, since it uses as much as digits as its factorization.

13711531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 315, while the sum is 22.

The square root of 13711531 is about 3702.9084514743. The cubic root of 13711531 is about 239.3473646196.

The spelling of 13711531 in words is "thirteen million, seven hundred eleven thousand, five hundred thirty-one".