211494220 has 48 divisors (see below), whose sum is σ = 521317440. Its totient is φ = 70550784.

The previous prime is 211494211. The next prime is 211494271. The reversal of 211494220 is 22494112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15235 + ... + 25594.

It is an arithmetic number, because the mean of its divisors is an integer number (10860780).

Almost surely, 2^211494220 is an apocalyptic number.

211494220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211494220 is an abundant number, since it is smaller than the sum of its proper divisors (309823220).

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

211494220 is a wasteful number, since it uses less digits than its factorization.

211494220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40882 (or 40880 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 211494220 is about 14542.8408503978. The cubic root of 211494220 is about 595.7986309792.

The spelling of 211494220 in words is "two hundred eleven million, four hundred ninety-four thousand, two hundred twenty".