82427181 has 4 divisors (see below), whose sum is σ = 109902912. Its totient is φ = 54951452.

The previous prime is 82427159. The next prime is 82427183. The reversal of 82427181 is 18172428.

It is a happy number.

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 82427181 - 2¹³ = 82418989 is a prime.

It is a super-2 number, since 2×82427181² = 13588480335213522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82427183) 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, 13737861 + ... + 13737866.

It is an arithmetic number, because the mean of its divisors is an integer number (27475728).

Almost surely, 2^82427181 is an apocalyptic number.

It is an amenable number.

82427181 is a deficient number, since it is larger than the sum of its proper divisors (27475731).

82427181 is a wasteful number, since it uses less digits than its factorization.

82427181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27475730.

The product of its digits is 7168, while the sum is 33.

The square root of 82427181 is about 9078.9416233391. The cubic root of 82427181 is about 435.2012650362.

The spelling of 82427181 in words is "eighty-two million, four hundred twenty-seven thousand, one hundred eighty-one".