10822981 has 8 divisors (see below), whose sum is σ = 11971064. Its totient is φ = 9720000.

The previous prime is 10822967. The next prime is 10822991. The reversal of 10822981 is 18922801.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5688225 + 5134756 = 2385^2 + 2266^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(10822981) divides (10822981-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 10822981 - 2¹¹ = 10820933 is a prime.

It is a super-2 number, since 2×10822981² = 234273835452722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10822961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10770 + ... + 11731.

It is an arithmetic number, because the mean of its divisors is an integer number (1496383).

Almost surely, 2^10822981 is an apocalyptic number.

It is an amenable number.

10822981 is a deficient number, since it is larger than the sum of its proper divisors (1148083).

10822981 is a wasteful number, since it uses less digits than its factorization.

10822981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22551.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 10822981 is about 3289.8299348143. The cubic root of 10822981 is about 221.1985616746.

The spelling of 10822981 in words is "ten million, eight hundred twenty-two thousand, nine hundred eighty-one".