13871551 has 2 divisors, whose sum is σ = 13871552. Its totient is φ = 13871550.

The previous prime is 13871537. The next prime is 13871573. The reversal of 13871551 is 15517831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13871551 - 2⁵ = 13871519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13871581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6935775 + 6935776.

It is an arithmetic number, because the mean of its divisors is an integer number (6935776).

Almost surely, 2^13871551 is an apocalyptic number.

13871551 is a deficient number, since it is larger than the sum of its proper divisors (1).

13871551 is an equidigital number, since it uses as much as digits as its factorization.

13871551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 31.

The square root of 13871551 is about 3724.4531142169. The cubic root of 13871551 is about 240.2748644843.

The spelling of 13871551 in words is "thirteen million, eight hundred seventy-one thousand, five hundred fifty-one".