82378055 has 4 divisors (see below), whose sum is σ = 98853672. Its totient is φ = 65902440.

The previous prime is 82378033. The next prime is 82378069. The reversal of 82378055 is 55087328.

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

It is not a de Polignac number, because 82378055 - 2¹⁶ = 82312519 is a prime.

It is a super-2 number, since 2×82378055² = 13572287891166050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8237801 + ... + 8237810.

It is an arithmetic number, because the mean of its divisors is an integer number (24713418).

Almost surely, 2^82378055 is an apocalyptic number.

82378055 is a deficient number, since it is larger than the sum of its proper divisors (16475617).

82378055 is a wasteful number, since it uses less digits than its factorization.

82378055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16475616.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 82378055 is about 9076.2357285386. The cubic root of 82378055 is about 435.1147889253.

The spelling of 82378055 in words is "eighty-two million, three hundred seventy-eight thousand, fifty-five".