82272257 has 4 divisors (see below), whose sum is σ = 82322436. Its totient is φ = 82222080.

The previous prime is 82272221. The next prime is 82272313. The reversal of 82272257 is 75227228.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80712256 + 1560001 = 8984^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 82272257 - 2¹⁸ = 82010113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82271257) 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, 22544 + ... + 25937.

It is an arithmetic number, because the mean of its divisors is an integer number (20580609).

Almost surely, 2^82272257 is an apocalyptic number.

It is an amenable number.

82272257 is a deficient number, since it is larger than the sum of its proper divisors (50179).

82272257 is a wasteful number, since it uses less digits than its factorization.

82272257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50178.

The product of its digits is 31360, while the sum is 35.

The square root of 82272257 is about 9070.4055587388. The cubic root of 82272257 is about 434.9284367236.

The spelling of 82272257 in words is "eighty-two million, two hundred seventy-two thousand, two hundred fifty-seven".