212440140231 has 16 divisors (see below), whose sum is σ = 309012433920. Its totient is φ = 128748019520.

The previous prime is 212440140223. The next prime is 212440140257. The reversal of 212440140231 is 132041044212.

It is a cyclic number.

It is not a de Polignac number, because 212440140231 - 2³ = 212440140223 is a prime.

It is a super-2 number, since 2×212440140231² (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 (212440140131) 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, 1579555 + ... + 1708763.

It is an arithmetic number, because the mean of its divisors is an integer number (19313277120).

Almost surely, 2^212440140231 is an apocalyptic number.

212440140231 is a deficient number, since it is larger than the sum of its proper divisors (96572293689).

212440140231 is a wasteful number, since it uses less digits than its factorization.

212440140231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179046.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 212440140231 its reverse (132041044212), we get a palindrome (344481184443).

The spelling of 212440140231 in words is "two hundred twelve billion, four hundred forty million, one hundred forty thousand, two hundred thirty-one".