211304075730 has 64 divisors (see below), whose sum is σ = 554553216000. Its totient is φ = 51102941120.

The previous prime is 211304075699. The next prime is 211304075737. The reversal of 211304075730 is 37570403112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211304075691 and 211304075700.

It is not an unprimeable number, because it can be changed into a prime (211304075737) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 625830 + ... + 902369.

It is an arithmetic number, because the mean of its divisors is an integer number (8664894000).

Almost surely, 2^211304075730 is an apocalyptic number.

211304075730 is an abundant number, since it is smaller than the sum of its proper divisors (343249140270).

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

211304075730 is a wasteful number, since it uses less digits than its factorization.

211304075730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528639.

The product of its (nonzero) digits is 17640, while the sum is 33.

Adding to 211304075730 its reverse (37570403112), we get a palindrome (248874478842).

The spelling of 211304075730 in words is "two hundred eleven billion, three hundred four million, seventy-five thousand, seven hundred thirty".