82510899 has 4 divisors (see below), whose sum is σ = 110014536. Its totient is φ = 55007264.

The previous prime is 82510891. The next prime is 82510919. The reversal of 82510899 is 99801528.

It is a happy number.

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 82510899 - 2³ = 82510891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82510899.

It is not an unprimeable number, because it can be changed into a prime (82510891) 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, 13751814 + ... + 13751819.

It is an arithmetic number, because the mean of its divisors is an integer number (27503634).

Almost surely, 2^82510899 is an apocalyptic number.

82510899 is a deficient number, since it is larger than the sum of its proper divisors (27503637).

82510899 is a wasteful number, since it uses less digits than its factorization.

82510899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27503636.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 82510899 is about 9083.5510126822. The cubic root of 82510899 is about 435.3485540376.

The spelling of 82510899 in words is "eighty-two million, five hundred ten thousand, eight hundred ninety-nine".