211304331 has 12 divisors (see below), whose sum is σ = 348819952. Its totient is φ = 120745296.

The previous prime is 211304323. The next prime is 211304341. The reversal of 211304331 is 133403112.

It is not a de Polignac number, because 211304331 - 2³ = 211304323 is a prime.

It is a super-2 number, since 2×211304331² = 89299040598715122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211304341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1676956 + ... + 1677081.

Almost surely, 2^211304331 is an apocalyptic number.

211304331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211304331 is a deficient number, since it is larger than the sum of its proper divisors (137515621).

211304331 is a wasteful number, since it uses less digits than its factorization.

211304331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354050 (or 3354047 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 211304331 is about 14536.3107768099. The cubic root of 211304331 is about 595.6202660061.

Adding to 211304331 its reverse (133403112), we get a palindrome (344707443).

The spelling of 211304331 in words is "two hundred eleven million, three hundred four thousand, three hundred thirty-one".