211972190 has 16 divisors (see below), whose sum is σ = 385838640. Its totient is φ = 83835840.

The previous prime is 211972171. The next prime is 211972193. The reversal of 211972190 is 91279112.

It is a super-2 number, since 2×211972190² = 89864418666792200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211972193) 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 7 ways as a sum of consecutive naturals, for example, 118196 + ... + 119975.

It is an arithmetic number, because the mean of its divisors is an integer number (24114915).

Almost surely, 2^211972190 is an apocalyptic number.

211972190 is a deficient number, since it is larger than the sum of its proper divisors (173866450).

211972190 is a wasteful number, since it uses less digits than its factorization.

211972190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238267.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 211972190 is about 14559.2647479191. The cubic root of 211972190 is about 596.2471217449.

It can be divided in two parts, 21197 and 2190, that multiplied together give a triangular number (46421430 = T₉₆₃₅).

The spelling of 211972190 in words is "two hundred eleven million, nine hundred seventy-two thousand, one hundred ninety".