15891371 has 2 divisors, whose sum is σ = 15891372. Its totient is φ = 15891370.

The previous prime is 15891347. The next prime is 15891373. The reversal of 15891371 is 17319851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15891371 - 2¹⁴ = 15874987 is a prime.

Together with 15891373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15891373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7945685 + 7945686.

It is an arithmetic number, because the mean of its divisors is an integer number (7945686).

Almost surely, 2^15891371 is an apocalyptic number.

15891371 is a deficient number, since it is larger than the sum of its proper divisors (1).

15891371 is an equidigital number, since it uses as much as digits as its factorization.

15891371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 35.

The square root of 15891371 is about 3986.3982490464. The cubic root of 15891371 is about 251.4126480009.

The spelling of 15891371 in words is "fifteen million, eight hundred ninety-one thousand, three hundred seventy-one".