211949994 has 8 divisors (see below), whose sum is σ = 423900000. Its totient is φ = 70649996.

The previous prime is 211949993. The next prime is 211950017. The reversal of 211949994 is 499949112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

211949994 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (211949993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17662494 + ... + 17662505.

It is an arithmetic number, because the mean of its divisors is an integer number (52987500).

Almost surely, 2^211949994 is an apocalyptic number.

211949994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

211949994 is a wasteful number, since it uses less digits than its factorization.

211949994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35325004.

The product of its digits is 209952, while the sum is 48.

The square root of 211949994 is about 14558.5024641960. The cubic root of 211949994 is about 596.2263096389.

The spelling of 211949994 in words is "two hundred eleven million, nine hundred forty-nine thousand, nine hundred ninety-four".