211605342 has 32 divisors (see below), whose sum is σ = 457712640. Its totient is φ = 64831200.

The previous prime is 211605323. The next prime is 211605377. The reversal of 211605342 is 243506112.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12967 + ... + 24317.

It is an arithmetic number, because the mean of its divisors is an integer number (14303520).

Almost surely, 2^211605342 is an apocalyptic number.

211605342 is an abundant number, since it is smaller than the sum of its proper divisors (246107298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211605342 is a wasteful number, since it uses less digits than its factorization.

211605342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11608.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 211605342 is about 14546.6608539555. The cubic root of 211605342 is about 595.9029596674.

The spelling of 211605342 in words is "two hundred eleven million, six hundred five thousand, three hundred forty-two".