82274581 has 4 divisors (see below), whose sum is σ = 84025152. Its totient is φ = 80524012.

The previous prime is 82274567. The next prime is 82274627. The reversal of 82274581 is 18547228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82274581 - 2⁹ = 82274069 is a prime.

It is a super-2 number, since 2×82274581² = 13538213357451122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82274581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82274081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875215 + ... + 875308.

It is an arithmetic number, because the mean of its divisors is an integer number (21006288).

Almost surely, 2^82274581 is an apocalyptic number.

It is an amenable number.

82274581 is a deficient number, since it is larger than the sum of its proper divisors (1750571).

82274581 is a wasteful number, since it uses less digits than its factorization.

82274581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750570.

The product of its digits is 35840, while the sum is 37.

The square root of 82274581 is about 9070.5336667696. The cubic root of 82274581 is about 434.9325319241.

The spelling of 82274581 in words is "eighty-two million, two hundred seventy-four thousand, five hundred eighty-one".