211545434 has 8 divisors (see below), whose sum is σ = 318095220. Its totient is φ = 105513696.

The previous prime is 211545431. The next prime is 211545437. The reversal of 211545434 is 434545112.

211545434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211545431) and next prime (211545437).

It can be written as a sum of positive squares in 2 ways, for example, as 174372025 + 37173409 = 13205^2 + 6097^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 211545397 and 211545406.

It is not an unprimeable number, because it can be changed into a prime (211545431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128489 + ... + 130124.

Almost surely, 2^211545434 is an apocalyptic number.

211545434 is a deficient number, since it is larger than the sum of its proper divisors (106549786).

211545434 is a wasteful number, since it uses less digits than its factorization.

211545434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259024.

The product of its digits is 9600, while the sum is 29.

The square root of 211545434 is about 14544.6015414655. The cubic root of 211545434 is about 595.8467186108.

The spelling of 211545434 in words is "two hundred eleven million, five hundred forty-five thousand, four hundred thirty-four".