211136442 has 16 divisors (see below), whose sum is σ = 460661472. Its totient is φ = 63980720.

The previous prime is 211136437. The next prime is 211136459. The reversal of 211136442 is 244631112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1599453 + ... + 1599584.

It is an arithmetic number, because the mean of its divisors is an integer number (28791342).

Almost surely, 2^211136442 is an apocalyptic number.

211136442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211136442 is an abundant number, since it is smaller than the sum of its proper divisors (249525030).

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

211136442 is a wasteful number, since it uses less digits than its factorization.

211136442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199053.

The product of its digits is 1152, while the sum is 24.

The square root of 211136442 is about 14530.5348146584. The cubic root of 211136442 is about 595.4624768652.

Adding to 211136442 its reverse (244631112), we get a palindrome (455767554).

The spelling of 211136442 in words is "two hundred eleven million, one hundred thirty-six thousand, four hundred forty-two".