105211919 has 2 divisors, whose sum is σ = 105211920. Its totient is φ = 105211918.

The previous prime is 105211903. The next prime is 105211937. The reversal of 105211919 is 919112501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105211919 - 2⁴ = 105211903 is a prime.

It is a super-2 number, since 2×105211919² = 22139095799325122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 105211891 and 105211900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105211999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52605959 + 52605960.

It is an arithmetic number, because the mean of its divisors is an integer number (52605960).

Almost surely, 2^105211919 is an apocalyptic number.

105211919 is a deficient number, since it is larger than the sum of its proper divisors (1).

105211919 is an equidigital number, since it uses as much as digits as its factorization.

105211919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 29.

The square root of 105211919 is about 10257.2861420553. The cubic root of 105211919 is about 472.0865717270.

The spelling of 105211919 in words is "one hundred five million, two hundred eleven thousand, nine hundred nineteen".