211064840 has 32 divisors (see below), whose sum is σ = 542738880. Its totient is φ = 72364992.

The previous prime is 211064837. The next prime is 211064849. The reversal of 211064840 is 48460112.

It is not an unprimeable number, because it can be changed into a prime (211064849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376622 + ... + 377181.

It is an arithmetic number, because the mean of its divisors is an integer number (16960590).

Almost surely, 2^211064840 is an apocalyptic number.

211064840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211064840 is an abundant number, since it is smaller than the sum of its proper divisors (331674040).

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

211064840 is a wasteful number, since it uses less digits than its factorization.

211064840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753821 (or 753817 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 211064840 is about 14528.0707597396. The cubic root of 211064840 is about 595.3951568509.

The spelling of 211064840 in words is "two hundred eleven million, sixty-four thousand, eight hundred forty".