212403344405 has 16 divisors (see below), whose sum is σ = 291307186944. Its totient is φ = 145642421760.

The previous prime is 212403344401. The next prime is 212403344411. The reversal of 212403344405 is 504443304212.

It is not a de Polignac number, because 212403344405 - 2² = 212403344401 is a prime.

It is a super-3 number, since 3×212403344405³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212403344401) 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, 945824 + ... + 1148646.

It is an arithmetic number, because the mean of its divisors is an integer number (18206699184).

Almost surely, 2^212403344405 is an apocalyptic number.

It is an amenable number.

212403344405 is a deficient number, since it is larger than the sum of its proper divisors (78903842539).

212403344405 is a wasteful number, since it uses less digits than its factorization.

212403344405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232756.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 212403344405 its reverse (504443304212), we get a palindrome (716846648617).

The spelling of 212403344405 in words is "two hundred twelve billion, four hundred three million, three hundred forty-four thousand, four hundred five".