211255345 has 64 divisors (see below), whose sum is σ = 328458240. Its totient is φ = 127024128.

The previous prime is 211255313. The next prime is 211255349. The reversal of 211255345 is 543552112.

It is not a de Polignac number, because 211255345 - 2⁵ = 211255313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211255349) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 588276 + ... + 588634.

It is an arithmetic number, because the mean of its divisors is an integer number (5132160).

Almost surely, 2^211255345 is an apocalyptic number.

It is an amenable number.

211255345 is a deficient number, since it is larger than the sum of its proper divisors (117202895).

211255345 is a wasteful number, since it uses less digits than its factorization.

211255345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454.

The product of its digits is 6000, while the sum is 28.

The square root of 211255345 is about 14534.6257261754. The cubic root of 211255345 is about 595.5742355420.

It can be divided in two parts, 211255 and 345, that added together give a square (211600 = 460²).

The spelling of 211255345 in words is "two hundred eleven million, two hundred fifty-five thousand, three hundred forty-five".