82290681 has 16 divisors (see below), whose sum is σ = 132995520. Its totient is φ = 49872960.

The previous prime is 82290613. The next prime is 82290683. The reversal of 82290681 is 18609228.

It is not a de Polignac number, because 82290681 - 2¹³ = 82282489 is a prime.

It is a super-2 number, since 2×82290681² = 13543512358887522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82290683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138240 + ... + 138833.

It is an arithmetic number, because the mean of its divisors is an integer number (8312220).

Almost surely, 2^82290681 is an apocalyptic number.

It is an amenable number.

82290681 is a deficient number, since it is larger than the sum of its proper divisors (50704839).

82290681 is a wasteful number, since it uses less digits than its factorization.

82290681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277093 (or 277087 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 82290681 is about 9071.4211124829. The cubic root of 82290681 is about 434.9609001717.

The spelling of 82290681 in words is "eighty-two million, two hundred ninety thousand, six hundred eighty-one".