81335220106232 has 16 divisors (see below), whose sum is σ = 155088343423800. Its totient is φ = 39978328526560.

The previous prime is 81335220106229. The next prime is 81335220106247. The reversal of 81335220106232 is 23260102253318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86160190319 + ... + 86160191262.

Almost surely, 2^{81335220106232} is an apocalyptic number.

It is an amenable number.

81335220106232 is a deficient number, since it is larger than the sum of its proper divisors (73753123317568).

81335220106232 is a wasteful number, since it uses less digits than its factorization.

81335220106232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172320381646 (or 172320381642 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 81335220106232 in words is "eighty-one trillion, three hundred thirty-five billion, two hundred twenty million, one hundred six thousand, two hundred thirty-two".