211355412 has 12 divisors (see below), whose sum is σ = 493162656. Its totient is φ = 70451800.

The previous prime is 211355401. The next prime is 211355413. The reversal of 211355412 is 214553112.

It is a happy number.

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

It is a super-2 number, since 2×211355412² = 89342220363379488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211355413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8806464 + ... + 8806487.

It is an arithmetic number, because the mean of its divisors is an integer number (41096888).

Almost surely, 2^211355412 is an apocalyptic number.

It is an amenable number.

211355412 is an abundant number, since it is smaller than the sum of its proper divisors (281807244).

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

211355412 is a wasteful number, since it uses less digits than its factorization.

211355412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17612958 (or 17612956 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 211355412 is about 14538.0676845308. The cubic root of 211355412 is about 595.6682574936.

The spelling of 211355412 in words is "two hundred eleven million, three hundred fifty-five thousand, four hundred twelve".