211954442 has 32 divisors (see below), whose sum is σ = 367984512. Its totient is φ = 89688384.

The previous prime is 211954441. The next prime is 211954447. The reversal of 211954442 is 244459112.

It is a junction number, because it is equal to n+sod(n) for n = 211954399 and 211954408.

It is not an unprimeable number, because it can be changed into a prime (211954441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668468 + ... + 668784.

It is an arithmetic number, because the mean of its divisors is an integer number (11499516).

Almost surely, 2^211954442 is an apocalyptic number.

211954442 is a deficient number, since it is larger than the sum of its proper divisors (156030070).

211954442 is a wasteful number, since it uses less digits than its factorization.

211954442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782.

The product of its digits is 11520, while the sum is 32.

The square root of 211954442 is about 14558.6552263593. The cubic root of 211954442 is about 596.2304804279.

The spelling of 211954442 in words is "two hundred eleven million, nine hundred fifty-four thousand, four hundred forty-two".