211430431133 has 4 divisors (see below), whose sum is σ = 211957689468. Its totient is φ = 210903172800.

The previous prime is 211430431129. The next prime is 211430431169. The reversal of 211430431133 is 331134034112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 210839843929 + 590587204 = 459173^2 + 24302^2 .

It is a cyclic number.

It is not a de Polignac number, because 211430431133 - 2² = 211430431129 is a prime.

It is a super-3 number, since 3×211430431133³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211430431123) 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, 263628566 + ... + 263629367.

It is an arithmetic number, because the mean of its divisors is an integer number (52989422367).

Almost surely, 2^211430431133 is an apocalyptic number.

It is an amenable number.

211430431133 is a deficient number, since it is larger than the sum of its proper divisors (527258335).

211430431133 is an equidigital number, since it uses as much as digits as its factorization.

211430431133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527258334.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 211430431133 its reverse (331134034112), we get a palindrome (542564465245).

The spelling of 211430431133 in words is "two hundred eleven billion, four hundred thirty million, four hundred thirty-one thousand, one hundred thirty-three".