82218455 has 8 divisors (see below), whose sum is σ = 107631504. Its totient is φ = 59795200.

The previous prime is 82218449. The next prime is 82218457. The reversal of 82218455 is 55481228.

It is a happy number.

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

It is not a de Polignac number, because 82218455 - 2⁴ = 82218439 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 (82218457) 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, 747386 + ... + 747495.

It is an arithmetic number, because the mean of its divisors is an integer number (13453938).

Almost surely, 2^82218455 is an apocalyptic number.

82218455 is a deficient number, since it is larger than the sum of its proper divisors (25413049).

82218455 is a wasteful number, since it uses less digits than its factorization.

82218455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494897.

The product of its digits is 25600, while the sum is 35.

The square root of 82218455 is about 9067.4392746795. The cubic root of 82218455 is about 434.8336087979.

The spelling of 82218455 in words is "eighty-two million, two hundred eighteen thousand, four hundred fifty-five".