211668514 has 4 divisors (see below), whose sum is σ = 317502774. Its totient is φ = 105834256.

The previous prime is 211668511. The next prime is 211668533. The reversal of 211668514 is 415866112.

211668514 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 202578289 + 9090225 = 14233^2 + 3015^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211668514.

It is not an unprimeable number, because it can be changed into a prime (211668511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52917127 + ... + 52917130.

Almost surely, 2^211668514 is an apocalyptic number.

211668514 is a deficient number, since it is larger than the sum of its proper divisors (105834260).

211668514 is a wasteful number, since it uses less digits than its factorization.

211668514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105834259.

The product of its digits is 11520, while the sum is 34.

The square root of 211668514 is about 14548.8320493433. The cubic root of 211668514 is about 595.9622534388.

The spelling of 211668514 in words is "two hundred eleven million, six hundred sixty-eight thousand, five hundred fourteen".