105722231 has 4 divisors (see below), whose sum is σ = 108300864. Its totient is φ = 103143600.

The previous prime is 105722219. The next prime is 105722257. The reversal of 105722231 is 132227501.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 105722231 - 2¹⁸ = 105460087 is a prime.

It is a super-2 number, since 2×105722231² = 22354380255234722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105722197 and 105722206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105722131) 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, 1289255 + ... + 1289336.

It is an arithmetic number, because the mean of its divisors is an integer number (27075216).

Almost surely, 2^105722231 is an apocalyptic number.

105722231 is a deficient number, since it is larger than the sum of its proper divisors (2578633).

105722231 is an equidigital number, since it uses as much as digits as its factorization.

105722231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578632.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 105722231 is about 10282.1316369710. The cubic root of 105722231 is about 472.8485987909.

Adding to 105722231 its reverse (132227501), we get a palindrome (237949732).

The spelling of 105722231 in words is "one hundred five million, seven hundred twenty-two thousand, two hundred thirty-one".