213509942889 has 16 divisors (see below), whose sum is σ = 295106459328. Its totient is φ = 137198601792.

The previous prime is 213509942881. The next prime is 213509942929. The reversal of 213509942889 is 988249905312.

It is not a de Polignac number, because 213509942889 - 2³ = 213509942881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213509942881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8976502 + ... + 9000255.

It is an arithmetic number, because the mean of its divisors is an integer number (18444153708).

Almost surely, 2^213509942889 is an apocalyptic number.

It is an amenable number.

213509942889 is a deficient number, since it is larger than the sum of its proper divisors (81596516439).

213509942889 is a wasteful number, since it uses less digits than its factorization.

213509942889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17976904.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 213509942889 in words is "two hundred thirteen billion, five hundred nine million, nine hundred forty-two thousand, eight hundred eighty-nine".