331213104 has 80 divisors (see below), whose sum is σ = 956605440. Its totient is φ = 109719360.

The previous prime is 331213097. The next prime is 331213117. The reversal of 331213104 is 401312133.

331213104 is a `hidden beast` number, since 331 + 21 + 310 + 4 = 666.

It is a super-2 number, since 2×331213104² = 219404240522629632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69849 + ... + 74439.

It is an arithmetic number, because the mean of its divisors is an integer number (11957568).

Almost surely, 2^331213104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331213104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478302720).

331213104 is an abundant number, since it is smaller than the sum of its proper divisors (625392336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331213104 is a wasteful number, since it uses less digits than its factorization.

331213104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775 (or 4763 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331213104 is about 18199.2610839012. The cubic root of 331213104 is about 691.8880614598. Note that the first 3 decimals are identical.

Adding to 331213104 its reverse (401312133), we get a palindrome (732525237).

The spelling of 331213104 in words is "three hundred thirty-one million, two hundred thirteen thousand, one hundred four".