211242291 has 16 divisors (see below), whose sum is σ = 310722720. Its totient is φ = 126823680.

The previous prime is 211242271. The next prime is 211242307. The reversal of 211242291 is 192242112.

It is not a de Polignac number, because 211242291 - 2¹³ = 211234099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211242271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64456 + ... + 67653.

It is an arithmetic number, because the mean of its divisors is an integer number (19420170).

Almost surely, 2^211242291 is an apocalyptic number.

211242291 is a deficient number, since it is larger than the sum of its proper divisors (99480429).

211242291 is a wasteful number, since it uses less digits than its factorization.

211242291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132166.

The product of its digits is 576, while the sum is 24.

The square root of 211242291 is about 14534.1766536670. The cubic root of 211242291 is about 595.5619679451.

The spelling of 211242291 in words is "two hundred eleven million, two hundred forty-two thousand, two hundred ninety-one".