212144523445 has 8 divisors (see below), whose sum is σ = 255123265536. Its totient is φ = 169349060496.

The previous prime is 212144523443. The next prime is 212144523449. The reversal of 212144523445 is 544325441212.

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

It is a cyclic number.

It is not a de Polignac number, because 212144523445 - 2¹ = 212144523443 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 (212144523443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45817237 + ... + 45821866.

It is an arithmetic number, because the mean of its divisors is an integer number (31890408192).

Almost surely, 2^212144523445 is an apocalyptic number.

It is an amenable number.

212144523445 is a deficient number, since it is larger than the sum of its proper divisors (42978742091).

212144523445 is an equidigital number, since it uses as much as digits as its factorization.

212144523445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91639571.

The product of its digits is 153600, while the sum is 37.

Adding to 212144523445 its reverse (544325441212), we get a palindrome (756469964657).

The spelling of 212144523445 in words is "two hundred twelve billion, one hundred forty-four million, five hundred twenty-three thousand, four hundred forty-five".