212400444545917 has 4 divisors (see below), whose sum is σ = 221635246482720. Its totient is φ = 203165642609116.

The previous prime is 212400444545897. The next prime is 212400444545921. The reversal of 212400444545917 is 719545444004212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212400444545917 - 2¹¹ = 212400444543869 is a prime.

It is a super-2 number, since 2×212400444545917² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212400441545917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4617400968367 + ... + 4617400968412.

It is an arithmetic number, because the mean of its divisors is an integer number (55408811620680).

Almost surely, 2^{212400444545917} is an apocalyptic number.

It is an amenable number.

212400444545917 is a deficient number, since it is larger than the sum of its proper divisors (9234801936803).

212400444545917 is an equidigital number, since it uses as much as digits as its factorization.

212400444545917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9234801936802.

The product of its (nonzero) digits is 6451200, while the sum is 52.

The spelling of 212400444545917 in words is "two hundred twelve trillion, four hundred billion, four hundred forty-four million, five hundred forty-five thousand, nine hundred seventeen".