211505034004 has 48 divisors (see below), whose sum is σ = 407658303360. Its totient is φ = 95216549760.

The previous prime is 211505033977. The next prime is 211505034017. The reversal of 211505034004 is 400430505112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 211505034004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13406529 + ... + 13422295.

It is an arithmetic number, because the mean of its divisors is an integer number (8492881320).

Almost surely, 2^211505034004 is an apocalyptic number.

It is an amenable number.

211505034004 is a deficient number, since it is larger than the sum of its proper divisors (196153269356).

211505034004 is a wasteful number, since it uses less digits than its factorization.

211505034004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18688 (or 18686 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 211505034004 its reverse (400430505112), we get a palindrome (611935539116).

The spelling of 211505034004 in words is "two hundred eleven billion, five hundred five million, thirty-four thousand, four".