212665642015 has 16 divisors (see below), whose sum is σ = 261283052448. Its totient is φ = 166080854016.

The previous prime is 212665641967. The next prime is 212665642037. The reversal of 212665642015 is 510246566212.

It is a happy number.

212665642015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212665642015 - 2¹³ = 212665633823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94767 + ... + 659023.

It is an arithmetic number, because the mean of its divisors is an integer number (16330190778).

Almost surely, 2^212665642015 is an apocalyptic number.

212665642015 is a deficient number, since it is larger than the sum of its proper divisors (48617410433).

212665642015 is a wasteful number, since it uses less digits than its factorization.

212665642015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566058.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 212665642015 in words is "two hundred twelve billion, six hundred sixty-five million, six hundred forty-two thousand, fifteen".