213185519900 has 72 divisors (see below), whose sum is σ = 499067276400. Its totient is φ = 78743741440.

The previous prime is 213185519893. The next prime is 213185519903. The reversal of 213185519900 is 9915581312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213185519903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1092950 + ... + 1273149.

It is an arithmetic number, because the mean of its divisors is an integer number (6931489950).

Almost surely, 2^213185519900 is an apocalyptic number.

213185519900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213185519900 is an abundant number, since it is smaller than the sum of its proper divisors (285881756500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213185519900 is a wasteful number, since it uses less digits than its factorization.

213185519900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366183 (or 2366176 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 44.

The spelling of 213185519900 in words is "two hundred thirteen billion, one hundred eighty-five million, five hundred nineteen thousand, nine hundred".