211146161305 has 4 divisors (see below), whose sum is σ = 253375393572. Its totient is φ = 168916929040.

The previous prime is 211146161297. The next prime is 211146161311. The reversal of 211146161305 is 503161641112.

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 111890919001 + 99255242304 = 334501^2 + 315048^2 .

It is not a de Polignac number, because 211146161305 - 2³ = 211146161297 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, 21114616126 + ... + 21114616135.

It is an arithmetic number, because the mean of its divisors is an integer number (63343848393).

Almost surely, 2^211146161305 is an apocalyptic number.

It is an amenable number.

211146161305 is a deficient number, since it is larger than the sum of its proper divisors (42229232267).

211146161305 is an equidigital number, since it uses as much as digits as its factorization.

211146161305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42229232266.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 211146161305 in words is "two hundred eleven billion, one hundred forty-six million, one hundred sixty-one thousand, three hundred five".