83218455 has 16 divisors (see below), whose sum is σ = 147944160. Its totient is φ = 44383104.

The previous prime is 83218441. The next prime is 83218481. The reversal of 83218455 is 55481238.

It is a happy number.

It is not a de Polignac number, because 83218455 - 2⁶ = 83218391 is a prime.

It is a super-2 number, since 2×83218455² = 13850622505174050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308082 + ... + 308351.

It is an arithmetic number, because the mean of its divisors is an integer number (9246510).

Almost surely, 2^83218455 is an apocalyptic number.

83218455 is a deficient number, since it is larger than the sum of its proper divisors (64725705).

83218455 is a wasteful number, since it uses less digits than its factorization.

83218455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616447 (or 616441 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 83218455 is about 9122.4149763097. The cubic root of 83218455 is about 436.5894291325.

The spelling of 83218455 in words is "eighty-three million, two hundred eighteen thousand, four hundred fifty-five".