211640332 has 6 divisors (see below), whose sum is σ = 370370588. Its totient is φ = 105820164.

The previous prime is 211640321. The next prime is 211640339. The reversal of 211640332 is 233046112.

It is not an unprimeable number, because it can be changed into a prime (211640339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26455038 + ... + 26455045.

Almost surely, 2^211640332 is an apocalyptic number.

It is an amenable number.

211640332 is a deficient number, since it is larger than the sum of its proper divisors (158730256).

211640332 is a wasteful number, since it uses less digits than its factorization.

211640332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52910087 (or 52910085 counting only the distinct ones).

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

The square root of 211640332 is about 14547.8634857494. The cubic root of 211640332 is about 595.9358030339.

Adding to 211640332 its reverse (233046112), we get a palindrome (444686444).

The spelling of 211640332 in words is "two hundred eleven million, six hundred forty thousand, three hundred thirty-two".