211345405563 has 16 divisors (see below), whose sum is σ = 285806416896. Its totient is φ = 138891271680.

The previous prime is 211345405559. The next prime is 211345405573. The reversal of 211345405563 is 365504543112.

It is a happy number.

It is not a de Polignac number, because 211345405563 - 2² = 211345405559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211345405553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1389531 + ... + 1534107.

It is an arithmetic number, because the mean of its divisors is an integer number (17862901056).

Almost surely, 2^211345405563 is an apocalyptic number.

211345405563 is a deficient number, since it is larger than the sum of its proper divisors (74461011333).

211345405563 is a wasteful number, since it uses less digits than its factorization.

211345405563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151514.

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 211345405563 its reverse (365504543112), we get a palindrome (576849948675).

The spelling of 211345405563 in words is "two hundred eleven billion, three hundred forty-five million, four hundred five thousand, five hundred sixty-three".