85420135222 has 4 divisors (see below), whose sum is σ = 128130202836. Its totient is φ = 42710067610.

The previous prime is 85420135193. The next prime is 85420135237. The reversal of 85420135222 is 22253102458.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21355033804 + ... + 21355033807.

It is an arithmetic number, because the mean of its divisors is an integer number (32032550709).

Almost surely, 2^85420135222 is an apocalyptic number.

85420135222 is a deficient number, since it is larger than the sum of its proper divisors (42710067614).

85420135222 is a wasteful number, since it uses less digits than its factorization.

85420135222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42710067613.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 85420135222 in words is "eighty-five billion, four hundred twenty million, one hundred thirty-five thousand, two hundred twenty-two".