211880345 has 8 divisors (see below), whose sum is σ = 254411520. Its totient is φ = 169400880.

The previous prime is 211880321. The next prime is 211880353. The reversal of 211880345 is 543088112.

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

It is not a de Polignac number, because 211880345 - 2¹⁰ = 211879321 is a prime.

It is a Curzon 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, 3251 + ... + 20840.

It is an arithmetic number, because the mean of its divisors is an integer number (31801440).

Almost surely, 2^211880345 is an apocalyptic number.

It is an amenable number.

211880345 is a deficient number, since it is larger than the sum of its proper divisors (42531175).

211880345 is a wasteful number, since it uses less digits than its factorization.

211880345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25855.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 211880345 is about 14556.1102290413. The cubic root of 211880345 is about 596.1609937359.

The spelling of 211880345 in words is "two hundred eleven million, eight hundred eighty thousand, three hundred forty-five".