213255435640065 has 32 divisors (see below), whose sum is σ = 419949165570816. Its totient is φ = 89989106906880.

The previous prime is 213255435640031. The next prime is 213255435640123. The reversal of 213255435640065 is 560046534552312.

213255435640065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213255435640065 - 2⁹ = 213255435639553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78115542826 + ... + 78115545555.

It is an arithmetic number, because the mean of its divisors is an integer number (13123411424088).

Almost surely, 2^{213255435640065} is an apocalyptic number.

It is an amenable number.

213255435640065 is a deficient number, since it is larger than the sum of its proper divisors (206693729930751).

213255435640065 is a wasteful number, since it uses less digits than its factorization.

213255435640065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156231088409.

The product of its (nonzero) digits is 12960000, while the sum is 51.

The spelling of 213255435640065 in words is "two hundred thirteen trillion, two hundred fifty-five billion, four hundred thirty-five million, six hundred forty thousand, sixty-five".