211210234431 has 16 divisors (see below), whose sum is σ = 329328916224. Its totient is φ = 117884781504.

The previous prime is 211210234427. The next prime is 211210234441. The reversal of 211210234431 is 134432012112.

It is not a de Polignac number, because 211210234431 - 2² = 211210234427 is a prime.

It is a super-2 number, since 2×211210234431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210234441) 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, 116948286 + ... + 116950091.

It is an arithmetic number, because the mean of its divisors is an integer number (20583057264).

Almost surely, 2^211210234431 is an apocalyptic number.

211210234431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211210234431 is a deficient number, since it is larger than the sum of its proper divisors (118118681793).

211210234431 is a wasteful number, since it uses less digits than its factorization.

211210234431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233898430.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 211210234431 its reverse (134432012112), we get a palindrome (345642246543).

The spelling of 211210234431 in words is "two hundred eleven billion, two hundred ten million, two hundred thirty-four thousand, four hundred thirty-one".