211422087 has 12 divisors (see below), whose sum is σ = 305635824. Its totient is φ = 140833440.

The previous prime is 211422067. The next prime is 211422109. The reversal of 211422087 is 780224112.

It is not a de Polignac number, because 211422087 - 2⁸ = 211421831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211422087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211422007) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2998 + ... + 20780.

It is an arithmetic number, because the mean of its divisors is an integer number (25469652).

Almost surely, 2^211422087 is an apocalyptic number.

211422087 is a deficient number, since it is larger than the sum of its proper divisors (94213737).

211422087 is a wasteful number, since it uses less digits than its factorization.

211422087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19110 (or 19107 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 211422087 is about 14540.3606213876. The cubic root of 211422087 is about 595.7308881830.

Adding to 211422087 its reverse (780224112), we get a palindrome (991646199).

The spelling of 211422087 in words is "two hundred eleven million, four hundred twenty-two thousand, eighty-seven".