211534242 has 8 divisors (see below), whose sum is σ = 423068496. Its totient is φ = 70511412.

The previous prime is 211534241. The next prime is 211534249. The reversal of 211534242 is 242435112.

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

211534242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (211534241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17627848 + ... + 17627859.

It is an arithmetic number, because the mean of its divisors is an integer number (52883562).

Almost surely, 2^211534242 is an apocalyptic number.

211534242 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.

211534242 is a wasteful number, since it uses less digits than its factorization.

211534242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35255712.

The product of its digits is 1920, while the sum is 24.

The square root of 211534242 is about 14544.2167888133. The cubic root of 211534242 is about 595.8362104914.

Adding to 211534242 its reverse (242435112), we get a palindrome (453969354).

The spelling of 211534242 in words is "two hundred eleven million, five hundred thirty-four thousand, two hundred forty-two".