82271287 has 4 divisors (see below), whose sum is σ = 94024336. Its totient is φ = 70518240.

The previous prime is 82271281. The next prime is 82271339. The reversal of 82271287 is 78217228.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82271287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82271281) 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, 5876514 + ... + 5876527.

It is an arithmetic number, because the mean of its divisors is an integer number (23506084).

Almost surely, 2^82271287 is an apocalyptic number.

82271287 is a deficient number, since it is larger than the sum of its proper divisors (11753049).

82271287 is a wasteful number, since it uses less digits than its factorization.

82271287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11753048.

The product of its digits is 25088, while the sum is 37.

The square root of 82271287 is about 9070.3520879842. The cubic root of 82271287 is about 434.9267274303.

The spelling of 82271287 in words is "eighty-two million, two hundred seventy-one thousand, two hundred eighty-seven".