82231438 has 4 divisors (see below), whose sum is σ = 123347160. Its totient is φ = 41115718.

The previous prime is 82231433. The next prime is 82231439. The reversal of 82231438 is 83413228.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82231433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20557858 + ... + 20557861.

It is an arithmetic number, because the mean of its divisors is an integer number (30836790).

Almost surely, 2^82231438 is an apocalyptic number.

82231438 is a deficient number, since it is larger than the sum of its proper divisors (41115722).

82231438 is a wasteful number, since it uses less digits than its factorization.

82231438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41115721.

The product of its digits is 9216, while the sum is 31.

The square root of 82231438 is about 9068.1551596783. The cubic root of 82231438 is about 434.8564955801.

The spelling of 82231438 in words is "eighty-two million, two hundred thirty-one thousand, four hundred thirty-eight".