211161612 has 12 divisors (see below), whose sum is σ = 492710456. Its totient is φ = 70387200.

The previous prime is 211161583. The next prime is 211161617. The reversal of 211161612 is 216161112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (211161617) 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, 8798389 + ... + 8798412.

Almost surely, 2^211161612 is an apocalyptic number.

It is an amenable number.

211161612 is an abundant number, since it is smaller than the sum of its proper divisors (281548844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211161612 is a wasteful number, since it uses less digits than its factorization.

211161612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17596808 (or 17596806 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

The square root of 211161612 is about 14531.4008959907. The cubic root of 211161612 is about 595.4861380183.

The spelling of 211161612 in words is "two hundred eleven million, one hundred sixty-one thousand, six hundred twelve".