321131213 has 8 divisors (see below), whose sum is σ = 353192448. Its totient is φ = 290121264.

The previous prime is 321131189. The next prime is 321131219. The reversal of 321131213 is 312131123.

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

It is a cyclic number.

It is not a de Polignac number, because 321131213 - 2¹⁰ = 321130189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321131191 and 321131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321131219) 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, 262181 + ... + 263402.

It is an arithmetic number, because the mean of its divisors is an integer number (44149056).

Almost surely, 2^321131213 is an apocalyptic number.

It is an amenable number.

321131213 is a deficient number, since it is larger than the sum of its proper divisors (32061235).

321131213 is a wasteful number, since it uses less digits than its factorization.

321131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525643.

The product of its digits is 108, while the sum is 17.

The square root of 321131213 is about 17920.1342907915. The cubic root of 321131213 is about 684.7954087351.

Adding to 321131213 its reverse (312131123), we get a palindrome (633262336).

The spelling of 321131213 in words is "three hundred twenty-one million, one hundred thirty-one thousand, two hundred thirteen".