211868990 has 16 divisors (see below), whose sum is σ = 382745952. Its totient is φ = 84440544.

The previous prime is 211868971. The next prime is 211869029. The reversal of 211868990 is 99868112.

It is a super-3 number, since 3×211868990³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35474 + ... + 41013.

It is an arithmetic number, because the mean of its divisors is an integer number (23921622).

Almost surely, 2^211868990 is an apocalyptic number.

211868990 is a deficient number, since it is larger than the sum of its proper divisors (170876962).

211868990 is a wasteful number, since it uses less digits than its factorization.

211868990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76771.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 211868990 is about 14555.7201814270. The cubic root of 211868990 is about 596.1503438114.

The spelling of 211868990 in words is "two hundred eleven million, eight hundred sixty-eight thousand, nine hundred ninety".