211995412 has 12 divisors (see below), whose sum is σ = 373482900. Its totient is φ = 105286016.

The previous prime is 211995383. The next prime is 211995449. The reversal of 211995412 is 214599112.

It can be written as a sum of positive squares in 2 ways, for example, as 99720196 + 112275216 = 9986^2 + 10596^2 .

It is a congruent 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, 177253 + ... + 178444.

It is an arithmetic number, because the mean of its divisors is an integer number (31123575).

Almost surely, 2^211995412 is an apocalyptic number.

It is an amenable number.

211995412 is a deficient number, since it is larger than the sum of its proper divisors (161487488).

211995412 is a wasteful number, since it uses less digits than its factorization.

211995412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355850 (or 355848 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 211995412 is about 14560.0622251418. The cubic root of 211995412 is about 596.2688943260.

The spelling of 211995412 in words is "two hundred eleven million, nine hundred ninety-five thousand, four hundred twelve".