212505919518 has 16 divisors (see below), whose sum is σ = 425075325696. Its totient is φ = 70824725400.

The previous prime is 212505919511. The next prime is 212505919531. The reversal of 212505919518 is 815919505212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212505919511) 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, 2601708 + ... + 2682143.

It is an arithmetic number, because the mean of its divisors is an integer number (26567207856).

Almost surely, 2^212505919518 is an apocalyptic number.

212505919518 is an abundant number, since it is smaller than the sum of its proper divisors (212569406178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212505919518 is a wasteful number, since it uses less digits than its factorization.

212505919518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290559.

The product of its (nonzero) digits is 324000, while the sum is 48.

The spelling of 212505919518 in words is "two hundred twelve billion, five hundred five million, nine hundred nineteen thousand, five hundred eighteen".