105216311806 has 4 divisors (see below), whose sum is σ = 157824467712. Its totient is φ = 52608155902.

The previous prime is 105216311801. The next prime is 105216311857. The reversal of 105216311806 is 608113612501.

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

It is a super-2 number, since 2×105216311806² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105216311801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26304077950 + ... + 26304077953.

It is an arithmetic number, because the mean of its divisors is an integer number (39456116928).

Almost surely, 2^105216311806 is an apocalyptic number.

105216311806 is a deficient number, since it is larger than the sum of its proper divisors (52608155906).

105216311806 is an equidigital number, since it uses as much as digits as its factorization.

105216311806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52608155905.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 105216311806 in words is "one hundred five billion, two hundred sixteen million, three hundred eleven thousand, eight hundred six".