211022442 has 32 divisors (see below), whose sum is σ = 472104000. Its totient is φ = 69866064.

The previous prime is 211022429. The next prime is 211022453. The reversal of 211022442 is 244220112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5068 + ... + 21159.

It is an arithmetic number, because the mean of its divisors is an integer number (14753250).

Almost surely, 2^211022442 is an apocalyptic number.

211022442 is an abundant number, since it is smaller than the sum of its proper divisors (261081558).

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

211022442 is a wasteful number, since it uses less digits than its factorization.

211022442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26387 (or 26381 counting only the distinct ones).

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

The square root of 211022442 is about 14526.6115112920. The cubic root of 211022442 is about 595.3552871844.

Adding to 211022442 its reverse (244220112), we get a palindrome (455242554).

The spelling of 211022442 in words is "two hundred eleven million, twenty-two thousand, four hundred forty-two".