81222431602 has 16 divisors (see below), whose sum is σ = 131213742912. Its totient is φ = 37484911440.

The previous prime is 81222431593. The next prime is 81222431623. The reversal of 81222431602 is 20613422218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362227 + ... + 541897.

It is an arithmetic number, because the mean of its divisors is an integer number (8200858932).

Almost surely, 2^81222431602 is an apocalyptic number.

81222431602 is a deficient number, since it is larger than the sum of its proper divisors (49991311310).

81222431602 is a wasteful number, since it uses less digits than its factorization.

81222431602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197073.

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

The spelling of 81222431602 in words is "eighty-one billion, two hundred twenty-two million, four hundred thirty-one thousand, six hundred two".