211520242534 has 8 divisors (see below), whose sum is σ = 317283364368. Its totient is φ = 105759121080.

The previous prime is 211520242523. The next prime is 211520242547. The reversal of 211520242534 is 435242025112.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 211520242496 and 211520242505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199642 + ... + 680365.

It is an arithmetic number, because the mean of its divisors is an integer number (39660420546).

Almost surely, 2^211520242534 is an apocalyptic number.

211520242534 is a deficient number, since it is larger than the sum of its proper divisors (105763121834).

211520242534 is a wasteful number, since it uses less digits than its factorization.

211520242534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000190.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 211520242534 its reverse (435242025112), we get a palindrome (646762267646).

The spelling of 211520242534 in words is "two hundred eleven billion, five hundred twenty million, two hundred forty-two thousand, five hundred thirty-four".