212131431445 has 16 divisors (see below), whose sum is σ = 265708172160. Its totient is φ = 162276105024.

The previous prime is 212131431443. The next prime is 212131431527. The reversal of 212131431445 is 544134131212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212131431445 - 2¹ = 212131431443 is a prime.

It is a super-3 number, since 3×212131431445³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212131431443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85702 + ... + 656968.

It is an arithmetic number, because the mean of its divisors is an integer number (16606760760).

Almost surely, 2^212131431445 is an apocalyptic number.

It is an amenable number.

212131431445 is a deficient number, since it is larger than the sum of its proper divisors (53576740715).

212131431445 is a wasteful number, since it uses less digits than its factorization.

212131431445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574524.

The product of its digits is 11520, while the sum is 31.

Adding to 212131431445 its reverse (544134131212), we get a palindrome (756265562657).

The spelling of 212131431445 in words is "two hundred twelve billion, one hundred thirty-one million, four hundred thirty-one thousand, four hundred forty-five".