213100444044 has 36 divisors (see below), whose sum is σ = 539700577416. Its totient is φ = 70897655808.

The previous prime is 213100444019. The next prime is 213100444049. The reversal of 213100444044 is 440444001312.

213100444044 is a `hidden beast` number, since 213 + 1 + 0 + 0 + 4 + 440 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 213100443999 and 213100444017.

It is not an unprimeable number, because it can be changed into a prime (213100444049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5640309 + ... + 5677964.

It is an arithmetic number, because the mean of its divisors is an integer number (14991682706).

Almost surely, 2^213100444044 is an apocalyptic number.

It is an amenable number.

213100444044 is an abundant number, since it is smaller than the sum of its proper divisors (326600133372).

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

213100444044 is a wasteful number, since it uses less digits than its factorization.

213100444044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11318806 (or 11318801 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 213100444044 its reverse (440444001312), we get a palindrome (653544445356).

The spelling of 213100444044 in words is "two hundred thirteen billion, one hundred million, four hundred forty-four thousand, forty-four".