211355345 has 4 divisors (see below), whose sum is σ = 253626420. Its totient is φ = 169084272.

The previous prime is 211355317. The next prime is 211355351. The reversal of 211355345 is 543553112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78552769 + 132802576 = 8863^2 + 11524^2 .

It is a cyclic number.

It is not a de Polignac number, because 211355345 - 2¹² = 211351249 is a prime.

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, 21135530 + ... + 21135539.

It is an arithmetic number, because the mean of its divisors is an integer number (63406605).

Almost surely, 2^211355345 is an apocalyptic number.

It is an amenable number.

211355345 is a deficient number, since it is larger than the sum of its proper divisors (42271075).

211355345 is an equidigital number, since it uses as much as digits as its factorization.

211355345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42271074.

The product of its digits is 9000, while the sum is 29.

The square root of 211355345 is about 14538.0653802354. The cubic root of 211355345 is about 595.6681945510.

The spelling of 211355345 in words is "two hundred eleven million, three hundred fifty-five thousand, three hundred forty-five".