212423345643 has 8 divisors (see below), whose sum is σ = 283263758800. Its totient is φ = 141599248128.

The previous prime is 212423345639. The next prime is 212423345689. The reversal of 212423345643 is 346543324212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212423345643 - 2² = 212423345639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212423345633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4048498 + ... + 4100631.

It is an arithmetic number, because the mean of its divisors is an integer number (35407969850).

Almost surely, 2^212423345643 is an apocalyptic number.

212423345643 is a deficient number, since it is larger than the sum of its proper divisors (70840413157).

212423345643 is an equidigital number, since it uses as much as digits as its factorization.

212423345643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8157821.

The product of its digits is 414720, while the sum is 39.

Adding to 212423345643 its reverse (346543324212), we get a palindrome (558966669855).

The spelling of 212423345643 in words is "two hundred twelve billion, four hundred twenty-three million, three hundred forty-five thousand, six hundred forty-three".