31183128213 has 8 divisors (see below), whose sum is σ = 42701220768. Its totient is φ = 20226893904.

The previous prime is 31183128173. The next prime is 31183128269. The reversal of 31183128213 is 31282138113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31183128213 - 2¹⁰ = 31183127189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31183128113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140464431 + ... + 140464652.

It is an arithmetic number, because the mean of its divisors is an integer number (5337652596).

Almost surely, 2^31183128213 is an apocalyptic number.

It is an amenable number.

31183128213 is a deficient number, since it is larger than the sum of its proper divisors (11518092555).

31183128213 is a wasteful number, since it uses less digits than its factorization.

31183128213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280929123.

The product of its digits is 6912, while the sum is 33.

The spelling of 31183128213 in words is "thirty-one billion, one hundred eighty-three million, one hundred twenty-eight thousand, two hundred thirteen".