82219557 has 16 divisors (see below), whose sum is σ = 125535872. Its totient is φ = 46889280.

The previous prime is 82219547. The next prime is 82219559. The reversal of 82219557 is 75591228.

It is not a de Polignac number, because 82219557 - 2⁶ = 82219493 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is the 9068-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82219559) by changing a digit.

It is a nontrivial repunit in base 9067.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7743 + ... + 14979.

It is an arithmetic number, because the mean of its divisors is an integer number (7845992).

Almost surely, 2^82219557 is an apocalyptic number.

It is an amenable number.

82219557 is a deficient number, since it is larger than the sum of its proper divisors (43316315).

82219557 is a wasteful number, since it uses less digits than its factorization.

82219557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7788.

The product of its digits is 50400, while the sum is 39.

The square root of 82219557 is about 9067.5000413565. The cubic root of 82219557 is about 434.8355515267.

The spelling of 82219557 in words is "eighty-two million, two hundred nineteen thousand, five hundred fifty-seven".