82799531 has 4 divisors (see below), whose sum is σ = 82888464. Its totient is φ = 82710600.

The previous prime is 82799527. The next prime is 82799557. The reversal of 82799531 is 13599728.

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 82799531 - 2² = 82799527 is a prime.

It is a super-2 number, since 2×82799531² = 13711524667639922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82799831) 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, 43055 + ... + 44936.

It is an arithmetic number, because the mean of its divisors is an integer number (20722116).

Almost surely, 2^82799531 is an apocalyptic number.

82799531 is a deficient number, since it is larger than the sum of its proper divisors (88933).

82799531 is an equidigital number, since it uses as much as digits as its factorization.

82799531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88932.

The product of its digits is 136080, while the sum is 44.

The square root of 82799531 is about 9099.4247620385. The cubic root of 82799531 is about 435.8555952916.

The spelling of 82799531 in words is "eighty-two million, seven hundred ninety-nine thousand, five hundred thirty-one".