211031345 has 8 divisors (see below), whose sum is σ = 289414464. Its totient is φ = 144707184.

The previous prime is 211031323. The next prime is 211031407. The reversal of 211031345 is 543130112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211031345 - 2¹⁶ = 210965809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3014699 + ... + 3014768.

It is an arithmetic number, because the mean of its divisors is an integer number (36176808).

Almost surely, 2^211031345 is an apocalyptic number.

It is an amenable number.

211031345 is a deficient number, since it is larger than the sum of its proper divisors (78383119).

211031345 is an equidigital number, since it uses as much as digits as its factorization.

211031345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029479.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 211031345 is about 14526.9179456621. The cubic root of 211031345 is about 595.3636597119.

Adding to 211031345 its reverse (543130112), we get a palindrome (754161457).

The spelling of 211031345 in words is "two hundred eleven million, thirty-one thousand, three hundred forty-five".