211330642 has 4 divisors (see below), whose sum is σ = 316995966. Its totient is φ = 105665320.

The previous prime is 211330619. The next prime is 211330697. The reversal of 211330642 is 246033112.

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., 133379401 + 77951241 = 11549^2 + 8829^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52832659 + ... + 52832662.

Almost surely, 2^211330642 is an apocalyptic number.

211330642 is a deficient number, since it is larger than the sum of its proper divisors (105665324).

211330642 is a wasteful number, since it uses less digits than its factorization.

211330642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105665323.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 211330642 is about 14537.2157581842. The cubic root of 211330642 is about 595.6449866138.

Adding to 211330642 its reverse (246033112), we get a palindrome (457363754).

The spelling of 211330642 in words is "two hundred eleven million, three hundred thirty thousand, six hundred forty-two".