211742029 has 4 divisors (see below), whose sum is σ = 212310076. Its totient is φ = 211173984.

The previous prime is 211741993. The next prime is 211742033. The reversal of 211742029 is 920247112.

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 132940900 + 78801129 = 11530^2 + 8877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211742029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211741988 and 211742006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211742129) 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, 283464 + ... + 284209.

It is an arithmetic number, because the mean of its divisors is an integer number (53077519).

Almost surely, 2^211742029 is an apocalyptic number.

It is an amenable number.

211742029 is a deficient number, since it is larger than the sum of its proper divisors (568047).

211742029 is an equidigital number, since it uses as much as digits as its factorization.

211742029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568046.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 211742029 is about 14551.3583214764. The cubic root of 211742029 is about 596.0312403861.

The spelling of 211742029 in words is "two hundred eleven million, seven hundred forty-two thousand, twenty-nine".