75821422 has 4 divisors (see below), whose sum is σ = 113732136. Its totient is φ = 37910710.

The previous prime is 75821393. The next prime is 75821453. The reversal of 75821422 is 22412857.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18955354 + ... + 18955357.

It is an arithmetic number, because the mean of its divisors is an integer number (28433034).

Almost surely, 2^75821422 is an apocalyptic number.

75821422 is a deficient number, since it is larger than the sum of its proper divisors (37910714).

75821422 is a wasteful number, since it uses less digits than its factorization.

75821422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37910713.

The product of its digits is 8960, while the sum is 31.

The square root of 75821422 is about 8707.5497127493. The cubic root of 75821422 is about 423.2503329262.

The spelling of 75821422 in words is "seventy-five million, eight hundred twenty-one thousand, four hundred twenty-two".