213056105 has 4 divisors (see below), whose sum is σ = 255667332. Its totient is φ = 170444880.

The previous prime is 213056059. The next prime is 213056111. The reversal of 213056105 is 501650312.

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 150503824 + 62552281 = 12268^2 + 7909^2 .

It is not a de Polignac number, because 213056105 - 2¹⁰ = 213055081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21305606 + ... + 21305615.

It is an arithmetic number, because the mean of its divisors is an integer number (63916833).

Almost surely, 2^213056105 is an apocalyptic number.

It is an amenable number.

213056105 is a deficient number, since it is larger than the sum of its proper divisors (42611227).

213056105 is an equidigital number, since it uses as much as digits as its factorization.

213056105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42611226.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 213056105 is about 14596.4415183976. The cubic root of 213056105 is about 597.2616931003.

The spelling of 213056105 in words is "two hundred thirteen million, fifty-six thousand, one hundred five".