105640111 has 4 divisors (see below), whose sum is σ = 105672424. Its totient is φ = 105607800.

The previous prime is 105640109. The next prime is 105640147. The reversal of 105640111 is 111046501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111046501 = 53 ⋅2095217.

It is a cyclic number.

It is not a de Polignac number, because 105640111 - 2¹ = 105640109 is a prime.

It is a super-2 number, since 2×105640111² = 22319666104184642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105640211) 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, 10620 + ... + 18001.

It is an arithmetic number, because the mean of its divisors is an integer number (26418106).

Almost surely, 2^105640111 is an apocalyptic number.

105640111 is a deficient number, since it is larger than the sum of its proper divisors (32313).

105640111 is an equidigital number, since it uses as much as digits as its factorization.

105640111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32312.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 105640111 is about 10278.1375258361. The cubic root of 105640111 is about 472.7261383120.

Adding to 105640111 its reverse (111046501), we get a palindrome (216686612).

The spelling of 105640111 in words is "one hundred five million, six hundred forty thousand, one hundred eleven".