105722081 has 4 divisors (see below), whose sum is σ = 109367700. Its totient is φ = 102076464.

The previous prime is 105722077. The next prime is 105722083. The reversal of 105722081 is 180227501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53290000 + 52432081 = 7300^2 + 7241^2 .

It is a cyclic number.

It is not a de Polignac number, because 105722081 - 2² = 105722077 is a prime.

It is a super-2 number, since 2×105722081² = 22354316821941122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105722081.

It is not an unprimeable number, because it can be changed into a prime (105722083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822766 + ... + 1822823.

It is an arithmetic number, because the mean of its divisors is an integer number (27341925).

Almost surely, 2^105722081 is an apocalyptic number.

It is an amenable number.

105722081 is a deficient number, since it is larger than the sum of its proper divisors (3645619).

105722081 is an equidigital number, since it uses as much as digits as its factorization.

105722081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645618.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 105722081 is about 10282.1243427611. The cubic root of 105722081 is about 472.8483751630.

Adding to 105722081 its reverse (180227501), we get a palindrome (285949582).

The spelling of 105722081 in words is "one hundred five million, seven hundred twenty-two thousand, eighty-one".