211975442 has 64 divisors (see below), whose sum is σ = 392670720. Its totient is φ = 83897856.

The previous prime is 211975433. The next prime is 211975459. The reversal of 211975442 is 244579112.

It is a super-2 number, since 2×211975442² = 89867176022190728, which contains 22 as substring.

Its product of digits (20160) is a multiple of the sum of its prime divisors (315).

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 31 ways as a sum of consecutive naturals, for example, 1547198 + ... + 1547334.

It is an arithmetic number, because the mean of its divisors is an integer number (6135480).

Almost surely, 2^211975442 is an apocalyptic number.

211975442 is a deficient number, since it is larger than the sum of its proper divisors (180695278).

211975442 is a wasteful number, since it uses less digits than its factorization.

211975442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315.

The product of its digits is 20160, while the sum is 35.

The square root of 211975442 is about 14559.3764289546. The cubic root of 211975442 is about 596.2501708646.

The spelling of 211975442 in words is "two hundred eleven million, nine hundred seventy-five thousand, four hundred forty-two".