211213942 has 8 divisors (see below), whose sum is σ = 317334600. Its totient is φ = 105435744.

The previous prime is 211213939. The next prime is 211213969. The reversal of 211213942 is 249312112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211213942² = 89222658590358728, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 84067 + ... + 86542.

It is an arithmetic number, because the mean of its divisors is an integer number (39666825).

Almost surely, 2^211213942 is an apocalyptic number.

211213942 is a deficient number, since it is larger than the sum of its proper divisors (106120658).

211213942 is a wasteful number, since it uses less digits than its factorization.

211213942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171230.

The product of its digits is 864, while the sum is 25.

The square root of 211213942 is about 14533.2013679024. The cubic root of 211213942 is about 595.5353250138.

The spelling of 211213942 in words is "two hundred eleven million, two hundred thirteen thousand, nine hundred forty-two".