15822881 has 2 divisors, whose sum is σ = 15822882. Its totient is φ = 15822880.

The previous prime is 15822857. The next prime is 15822883. The reversal of 15822881 is 18822851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11022400 + 4800481 = 3320^2 + 2191^2 .

It is a cyclic number.

It is not a de Polignac number, because 15822881 - 2¹⁸ = 15560737 is a prime.

It is a super-2 number, since 2×15822881² = 500727126280322, which contains 22 as substring.

Together with 15822883, 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 (15822883) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7911440 + 7911441.

It is an arithmetic number, because the mean of its divisors is an integer number (7911441).

Almost surely, 2^15822881 is an apocalyptic number.

It is an amenable number.

15822881 is a deficient number, since it is larger than the sum of its proper divisors (1).

15822881 is an equidigital number, since it uses as much as digits as its factorization.

15822881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10240, while the sum is 35.

The square root of 15822881 is about 3977.7985117399. The cubic root of 15822881 is about 251.0509412328.

The spelling of 15822881 in words is "fifteen million, eight hundred twenty-two thousand, eight hundred eighty-one".