2158433281 has 2 divisors, whose sum is σ = 2158433282. Its totient is φ = 2158433280.

The previous prime is 2158433273. The next prime is 2158433297. The reversal of 2158433281 is 1823348512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1657792656 + 500640625 = 40716^2 + 22375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158433281 - 2³ = 2158433273 is a prime.

It is a super-2 number, since 2×2158433281² = 9317668457056849922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2158433281.

It is not a weakly prime, because it can be changed into another prime (2158433681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079216640 + 1079216641.

It is an arithmetic number, because the mean of its divisors is an integer number (1079216641).

Almost surely, 2^2158433281 is an apocalyptic number.

It is an amenable number.

2158433281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158433281 is an equidigital number, since it uses as much as digits as its factorization.

2158433281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 2158433281 is about 46458.9418842057. The cubic root of 2158433281 is about 1292.3482019648.

The spelling of 2158433281 in words is "two billion, one hundred fifty-eight million, four hundred thirty-three thousand, two hundred eighty-one".