211400344031231 has 4 divisors (see below), whose sum is σ = 211400516569632. Its totient is φ = 211400171492832.

The previous prime is 211400344031143. The next prime is 211400344031293. The reversal of 211400344031231 is 132130443004112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211400344031231 is a prime.

It is a super-2 number, since 2×211400344031231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211400344031194 and 211400344031203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211400344031131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84418106 + ... + 86886231.

It is an arithmetic number, because the mean of its divisors is an integer number (52850129142408).

Almost surely, 2^{211400344031231} is an apocalyptic number.

211400344031231 is a deficient number, since it is larger than the sum of its proper divisors (172538401).

211400344031231 is a wasteful number, since it uses less digits than its factorization.

211400344031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172538400.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 211400344031231 its reverse (132130443004112), we get a palindrome (343530787035343).

The spelling of 211400344031231 in words is "two hundred eleven trillion, four hundred billion, three hundred forty-four million, thirty-one thousand, two hundred thirty-one".