82257919 has 4 divisors (see below), whose sum is σ = 84481144. Its totient is φ = 80034696.

The previous prime is 82257899. The next prime is 82257937. The reversal of 82257919 is 91975228.

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

It is a cyclic number.

It is not a de Polignac number, because 82257919 - 2¹⁵ = 82225151 is a prime.

It is a super-2 number, since 2×82257919² = 13532730476421122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82257419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111557 + ... + 1111630.

It is an arithmetic number, because the mean of its divisors is an integer number (21120286).

Almost surely, 2^82257919 is an apocalyptic number.

82257919 is a deficient number, since it is larger than the sum of its proper divisors (2223225).

82257919 is a wasteful number, since it uses less digits than its factorization.

82257919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223224.

The product of its digits is 90720, while the sum is 43.

The square root of 82257919 is about 9069.6151517030. The cubic root of 82257919 is about 434.9031695337.

The spelling of 82257919 in words is "eighty-two million, two hundred fifty-seven thousand, nine hundred nineteen".