211116320 has 24 divisors (see below), whose sum is σ = 498762684. Its totient is φ = 84446464.

The previous prime is 211116313. The next prime is 211116341. The reversal of 211116320 is 23611112.

It can be written as a sum of positive squares in 2 ways, for example, as 210946576 + 169744 = 14524^2 + 412^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659579 + ... + 659898.

Almost surely, 2^211116320 is an apocalyptic number.

211116320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211116320 is an abundant number, since it is smaller than the sum of its proper divisors (287646364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211116320 is a wasteful number, since it uses less digits than its factorization.

211116320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319492 (or 1319484 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 211116320 is about 14529.8423941900. The cubic root of 211116320 is about 595.4435597509.

Adding to 211116320 its reverse (23611112), we get a palindrome (234727432).

The spelling of 211116320 in words is "two hundred eleven million, one hundred sixteen thousand, three hundred twenty".