282190981 has 2 divisors, whose sum is σ = 282190982. Its totient is φ = 282190980.

The previous prime is 282190969. The next prime is 282190999. The reversal of 282190981 is 189091282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253128100 + 29062881 = 15910^2 + 5391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-282190981 is a prime.

It is a super-2 number, since 2×282190981² = 159263499515484722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (282190901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141095490 + 141095491.

It is an arithmetic number, because the mean of its divisors is an integer number (141095491).

Almost surely, 2^282190981 is an apocalyptic number.

It is an amenable number.

282190981 is a deficient number, since it is larger than the sum of its proper divisors (1).

282190981 is an equidigital number, since it uses as much as digits as its factorization.

282190981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 282190981 is about 16798.5410378402. The cubic root of 282190981 is about 655.9152219475.

The spelling of 282190981 in words is "two hundred eighty-two million, one hundred ninety thousand, nine hundred eighty-one".