211766042 has 8 divisors (see below), whose sum is σ = 336334356. Its totient is φ = 99654592.

The previous prime is 211766041. The next prime is 211766047. The reversal of 211766042 is 240667112.

It can be written as a sum of positive squares in 2 ways, for example, as 190412401 + 21353641 = 13799^2 + 4621^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 211765996 and 211766014.

It is not an unprimeable number, because it can be changed into a prime (211766041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114173 + ... + 3114240.

Almost surely, 2^211766042 is an apocalyptic number.

211766042 is a deficient number, since it is larger than the sum of its proper divisors (124568314).

211766042 is a wasteful number, since it uses less digits than its factorization.

211766042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228432.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 211766042 is about 14552.1834100591. The cubic root of 211766042 is about 596.0537708795.

The spelling of 211766042 in words is "two hundred eleven million, seven hundred sixty-six thousand, forty-two".