82813558 has 4 divisors (see below), whose sum is σ = 124220340. Its totient is φ = 41406778.

The previous prime is 82813553. The next prime is 82813583. The reversal of 82813558 is 85531828.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 82813558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82813553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20703388 + ... + 20703391.

It is an arithmetic number, because the mean of its divisors is an integer number (31055085).

Almost surely, 2^82813558 is an apocalyptic number.

82813558 is a deficient number, since it is larger than the sum of its proper divisors (41406782).

82813558 is a wasteful number, since it uses less digits than its factorization.

82813558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41406781.

The product of its digits is 76800, while the sum is 40.

The square root of 82813558 is about 9100.1954924056. The cubic root of 82813558 is about 435.8802065470.

The spelling of 82813558 in words is "eighty-two million, eight hundred thirteen thousand, five hundred fifty-eight".