82415291 has 4 divisors (see below), whose sum is σ = 94188912. Its totient is φ = 70641672.

The previous prime is 82415237. The next prime is 82415323. The reversal of 82415291 is 19251428.

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-82415291 is a prime.

It is a super-2 number, since 2×82415291² = 13584560381229362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82415191) 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, 5886800 + ... + 5886813.

It is an arithmetic number, because the mean of its divisors is an integer number (23547228).

Almost surely, 2^82415291 is an apocalyptic number.

82415291 is a deficient number, since it is larger than the sum of its proper divisors (11773621).

82415291 is a wasteful number, since it uses less digits than its factorization.

82415291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11773620.

The product of its digits is 5760, while the sum is 32.

The square root of 82415291 is about 9078.2867877150. The cubic root of 82415291 is about 435.1803383151.

The spelling of 82415291 in words is "eighty-two million, four hundred fifteen thousand, two hundred ninety-one".