213231000009 has 32 divisors (see below), whose sum is σ = 303200484480. Its totient is φ = 132915589632.

The previous prime is 213231000007. The next prime is 213231000029. The reversal of 213231000009 is 900000132312.

It is a happy number.

It is not a de Polignac number, because 213231000009 - 2¹ = 213231000007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213231000001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1272039 + ... + 1429875.

It is an arithmetic number, because the mean of its divisors is an integer number (9475015140).

Almost surely, 2^213231000009 is an apocalyptic number.

It is an amenable number.

213231000009 is a deficient number, since it is larger than the sum of its proper divisors (89969484471).

213231000009 is a wasteful number, since it uses less digits than its factorization.

213231000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158169.

The product of its (nonzero) digits is 324, while the sum is 21.

The spelling of 213231000009 in words is "two hundred thirteen billion, two hundred thirty-one million, nine", and thus it is an aban number.