211422042 has 48 divisors (see below), whose sum is σ = 508769280. Its totient is φ = 65050128.

The previous prime is 211422031. The next prime is 211422059. The reversal of 211422042 is 240224112.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 2458 + ... + 20709.

It is an arithmetic number, because the mean of its divisors is an integer number (10599360).

Almost surely, 2^211422042 is an apocalyptic number.

211422042 is an abundant number, since it is smaller than the sum of its proper divisors (297347238).

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

211422042 is a wasteful number, since it uses less digits than its factorization.

211422042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23204 (or 23185 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 211422042 is about 14540.3590739706. The cubic root of 211422042 is about 595.7308459170.

Adding to 211422042 its reverse (240224112), we get a palindrome (451646154).

The spelling of 211422042 in words is "two hundred eleven million, four hundred twenty-two thousand, forty-two".