82213402 has 4 divisors (see below), whose sum is σ = 123320106. Its totient is φ = 41106700.

The previous prime is 82213381. The next prime is 82213427. The reversal of 82213402 is 20431228.

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

It can be written as a sum of positive squares in only one way, i.e., 81522841 + 690561 = 9029^2 + 831^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20553349 + ... + 20553352.

Almost surely, 2^82213402 is an apocalyptic number.

82213402 is a deficient number, since it is larger than the sum of its proper divisors (41106704).

82213402 is a wasteful number, since it uses less digits than its factorization.

82213402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41106703.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 82213402 is about 9067.1606360536. The cubic root of 82213402 is about 434.8247005820.

The spelling of 82213402 in words is "eighty-two million, two hundred thirteen thousand, four hundred two".