2281085690 has 16 divisors (see below), whose sum is σ = 4421797128. Its totient is φ = 842246976.

The previous prime is 2281085663. The next prime is 2281085699. The reversal of 2281085690 is 965801822.

It can be written as a sum of positive squares in 4 ways, for example, as 1885035889 + 396049801 = 43417^2 + 19901^2 .

It is a super-2 number, since 2×2281085690² = 10406703850245552200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2281085699) 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, 8773277 + ... + 8773536.

Almost surely, 2^2281085690 is an apocalyptic number.

2281085690 is a deficient number, since it is larger than the sum of its proper divisors (2140711438).

2281085690 is a wasteful number, since it uses less digits than its factorization.

2281085690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17546833.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 2281085690 is about 47760.7128296888. The cubic root of 2281085690 is about 1316.3777509183.

The spelling of 2281085690 in words is "two billion, two hundred eighty-one million, eighty-five thousand, six hundred ninety".