15883381 has 2 divisors, whose sum is σ = 15883382. Its totient is φ = 15883380.

The previous prime is 15883379. The next prime is 15883433. The reversal of 15883381 is 18338851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15563025 + 320356 = 3945^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 15883381 - 2¹ = 15883379 is a prime.

It is a super-2 number, since 2×15883381² = 504563583982322, which contains 22 as substring.

Together with 15883379, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 15883381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15883181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7941690 + 7941691.

It is an arithmetic number, because the mean of its divisors is an integer number (7941691).

Almost surely, 2^15883381 is an apocalyptic number.

It is an amenable number.

15883381 is a deficient number, since it is larger than the sum of its proper divisors (1).

15883381 is an equidigital number, since it uses as much as digits as its factorization.

15883381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 37.

The square root of 15883381 is about 3985.3959652712. The cubic root of 15883381 is about 251.3705051337.

The spelling of 15883381 in words is "fifteen million, eight hundred eighty-three thousand, three hundred eighty-one".