211322442 has 16 divisors (see below), whose sum is σ = 426523680. Its totient is φ = 69794352.

The previous prime is 211322437. The next prime is 211322453. The reversal of 211322442 is 244223112.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 160908 + ... + 162215.

It is an arithmetic number, because the mean of its divisors is an integer number (26657730).

Almost surely, 2^211322442 is an apocalyptic number.

211322442 is an abundant number, since it is smaller than the sum of its proper divisors (215201238).

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

211322442 is a wasteful number, since it uses less digits than its factorization.

211322442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323237.

The product of its digits is 768, while the sum is 21.

The square root of 211322442 is about 14536.9337206991. The cubic root of 211322442 is about 595.6372824904.

Adding to 211322442 its reverse (244223112), we get a palindrome (455545554).

The spelling of 211322442 in words is "two hundred eleven million, three hundred twenty-two thousand, four hundred forty-two".