213643423485 has 96 divisors (see below), whose sum is σ = 404335825920. Its totient is φ = 103938084864.

The previous prime is 213643423457. The next prime is 213643423489. The reversal of 213643423485 is 584324346312.

213643423485 is a `hidden beast` number, since 2 + 136 + 4 + 34 + 2 + 3 + 485 = 666.

It is not a de Polignac number, because 213643423485 - 2²⁷ = 213509205757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213643423485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213643423489) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3674521 + ... + 3732209.

It is an arithmetic number, because the mean of its divisors is an integer number (4211831520).

Almost surely, 2^213643423485 is an apocalyptic number.

It is an amenable number.

213643423485 is a deficient number, since it is larger than the sum of its proper divisors (190692402435).

213643423485 is a wasteful number, since it uses less digits than its factorization.

213643423485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57867 (or 57864 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

Adding to 213643423485 its reverse (584324346312), we get a palindrome (797967769797).

The spelling of 213643423485 in words is "two hundred thirteen billion, six hundred forty-three million, four hundred twenty-three thousand, four hundred eighty-five".