213675021685 has 16 divisors (see below), whose sum is σ = 265847357952. Its totient is φ = 164697048000.

The previous prime is 213675021671. The next prime is 213675021697. The reversal of 213675021685 is 586120576312.

It is not a de Polignac number, because 213675021685 - 2⁵ = 213675021653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3001266 + ... + 3071635.

It is an arithmetic number, because the mean of its divisors is an integer number (16615459872).

Almost surely, 2^213675021685 is an apocalyptic number.

It is an amenable number.

213675021685 is a deficient number, since it is larger than the sum of its proper divisors (52172336267).

213675021685 is a wasteful number, since it uses less digits than its factorization.

213675021685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6073164.

The product of its (nonzero) digits is 604800, while the sum is 46.

Adding to 213675021685 its reverse (586120576312), we get a palindrome (799795597997).

The spelling of 213675021685 in words is "two hundred thirteen billion, six hundred seventy-five million, twenty-one thousand, six hundred eighty-five".