82555213 has 8 divisors (see below), whose sum is σ = 94135608. Its totient is φ = 71721984.

The previous prime is 82555159. The next prime is 82555223. The reversal of 82555213 is 31255528.

It can be written as a sum of positive squares in 4 ways, for example, as 18507204 + 64048009 = 4302^2 + 8003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82555213 - 2¹⁷ = 82424141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82555223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186556 + ... + 186997.

It is an arithmetic number, because the mean of its divisors is an integer number (11766951).

Almost surely, 2^82555213 is an apocalyptic number.

It is an amenable number.

82555213 is a deficient number, since it is larger than the sum of its proper divisors (11580395).

82555213 is a wasteful number, since it uses less digits than its factorization.

82555213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373583.

The product of its digits is 12000, while the sum is 31.

The square root of 82555213 is about 9085.9899295564. The cubic root of 82555213 is about 435.4264774125.

It can be divided in two parts, 825552 and 13, that multiplied together give a square (10732176 = 3276²).

The spelling of 82555213 in words is "eighty-two million, five hundred fifty-five thousand, two hundred thirteen".