213928938385 has 16 divisors (see below), whose sum is σ = 263301328080. Its totient is φ = 166762408960.

The previous prime is 213928938367. The next prime is 213928938389. The reversal of 213928938385 is 583839829312.

It can be written as a sum of positive squares in 8 ways, for example, as 2888847504 + 211040090881 = 53748^2 + 459391^2 .

It is not a de Polignac number, because 213928938385 - 2¹¹ = 213928936337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213928938389) 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, 479122 + ... + 810811.

It is an arithmetic number, because the mean of its divisors is an integer number (16456333005).

Almost surely, 2^213928938385 is an apocalyptic number.

It is an amenable number.

213928938385 is a deficient number, since it is larger than the sum of its proper divisors (49372389695).

213928938385 is a wasteful number, since it uses less digits than its factorization.

213928938385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290788.

The product of its digits is 22394880, while the sum is 61.

The spelling of 213928938385 in words is "two hundred thirteen billion, nine hundred twenty-eight million, nine hundred thirty-eight thousand, three hundred eighty-five".