82646281 has 3 divisors (see below), whose sum is σ = 82655373. Its totient is φ = 82637190.

The previous prime is 82646261. The next prime is 82646303. The reversal of 82646281 is 18264628.

The square root of 82646281 is 9091.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 82646281 - 2¹³ = 82638089 is a prime.

It is a super-2 number, since 2×82646281² = 13660815526261922, 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 82646281.

It is not an unprimeable number, because it can be changed into a prime (82646261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4546 + ... + 13636.

It is an arithmetic number, because the mean of its divisors is an integer number (27551791).

Almost surely, 2^82646281 is an apocalyptic number.

82646281 is the 9091-st square number.

82646281 is the 4546-th centered octagonal number.

It is an amenable number.

82646281 is a deficient number, since it is larger than the sum of its proper divisors (9092).

82646281 is an frugal number, since it uses more digits than its factorization.

82646281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18182 (or 9091 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The cubic root of 82646281 is about 435.5865272553.

Multiplying 82646281 by its product of digits (36864), we get a square (3046672502784 = 1745472²).

The spelling of 82646281 in words is "eighty-two million, six hundred forty-six thousand, two hundred eighty-one".