82213942 has 4 divisors (see below), whose sum is σ = 123320916. Its totient is φ = 41106970.

The previous prime is 82213919. The next prime is 82213973. The reversal of 82213942 is 24931228.

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20553484 + ... + 20553487.

It is an arithmetic number, because the mean of its divisors is an integer number (30830229).

Almost surely, 2^82213942 is an apocalyptic number.

82213942 is a deficient number, since it is larger than the sum of its proper divisors (41106974).

82213942 is a wasteful number, since it uses less digits than its factorization.

82213942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41106973.

The product of its digits is 6912, while the sum is 31.

The square root of 82213942 is about 9067.1904137941. The cubic root of 82213942 is about 434.8256525956.

The spelling of 82213942 in words is "eighty-two million, two hundred thirteen thousand, nine hundred forty-two".