211219942 has 8 divisors (see below), whose sum is σ = 322024032. Its totient is φ = 103878600.

The previous prime is 211219919. The next prime is 211219949. The reversal of 211219942 is 249912112.

It is a happy number.

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

It is a super-2 number, since 2×211219942² = 89227727796966728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211219949) by changing a digit.

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, 865534 + ... + 865777.

It is an arithmetic number, because the mean of its divisors is an integer number (40253004).

Almost surely, 2^211219942 is an apocalyptic number.

211219942 is a deficient number, since it is larger than the sum of its proper divisors (110804090).

211219942 is a wasteful number, since it uses less digits than its factorization.

211219942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731374.

The product of its digits is 2592, while the sum is 31.

The square root of 211219942 is about 14533.4077903291. The cubic root of 211219942 is about 595.5409641272.

The spelling of 211219942 in words is "two hundred eleven million, two hundred nineteen thousand, nine hundred forty-two".