211433890 has 16 divisors (see below), whose sum is σ = 380884032. Its totient is φ = 84506224.

The previous prime is 211433861. The next prime is 211433899. The reversal of 211433890 is 98334112.

It is not an unprimeable number, because it can be changed into a prime (211433899) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5937 + ... + 21403.

It is an arithmetic number, because the mean of its divisors is an integer number (23805252).

Almost surely, 2^211433890 is an apocalyptic number.

211433890 is a deficient number, since it is larger than the sum of its proper divisors (169450142).

211433890 is a wasteful number, since it uses less digits than its factorization.

211433890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16841.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 211433890 is about 14540.7664859869. The cubic root of 211433890 is about 595.7419738757.

The spelling of 211433890 in words is "two hundred eleven million, four hundred thirty-three thousand, eight hundred ninety".