212234661543 has 4 divisors (see below), whose sum is σ = 282979548728. Its totient is φ = 141489774360.

The previous prime is 212234661503. The next prime is 212234661547. The reversal of 212234661543 is 345166432212.

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

It is not a de Polignac number, because 212234661543 - 2²¹ = 212232564391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212234661547) 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, 35372443588 + ... + 35372443593.

It is an arithmetic number, because the mean of its divisors is an integer number (70744887182).

Almost surely, 2^212234661543 is an apocalyptic number.

212234661543 is a deficient number, since it is larger than the sum of its proper divisors (70744887185).

212234661543 is an equidigital number, since it uses as much as digits as its factorization.

212234661543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70744887184.

The product of its digits is 207360, while the sum is 39.

The spelling of 212234661543 in words is "two hundred twelve billion, two hundred thirty-four million, six hundred sixty-one thousand, five hundred forty-three".