213509840841 has 40 divisors (see below), whose sum is σ = 348475748544. Its totient is φ = 129201389280.

The previous prime is 213509840833. The next prime is 213509840897. The reversal of 213509840841 is 148048905312.

213509840841 is a `hidden beast` number, since 21 + 3 + 509 + 8 + 40 + 84 + 1 = 666.

It is not a de Polignac number, because 213509840841 - 2³ = 213509840833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213509840801) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 398340 + ... + 765306.

Almost surely, 2^213509840841 is an apocalyptic number.

It is an amenable number.

213509840841 is a deficient number, since it is larger than the sum of its proper divisors (134965907703).

213509840841 is a wasteful number, since it uses less digits than its factorization.

213509840841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367643 (or 367634 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 213509840841 in words is "two hundred thirteen billion, five hundred nine million, eight hundred forty thousand, eight hundred forty-one".