211530342 has 8 divisors (see below), whose sum is σ = 423060696. Its totient is φ = 70510112.

The previous prime is 211530299. The next prime is 211530349. The reversal of 211530342 is 243035112.

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

211530342 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211530349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17627523 + ... + 17627534.

It is an arithmetic number, because the mean of its divisors is an integer number (52882587).

Almost surely, 2^211530342 is an apocalyptic number.

211530342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

211530342 is a wasteful number, since it uses less digits than its factorization.

211530342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35255062.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 211530342 is about 14544.0827142862. The cubic root of 211530342 is about 595.8325487115.

Adding to 211530342 its reverse (243035112), we get a palindrome (454565454).

The spelling of 211530342 in words is "two hundred eleven million, five hundred thirty thousand, three hundred forty-two".