331321001 has 8 divisors (see below), whose sum is σ = 369131904. Its totient is φ = 294791920.

The previous prime is 331320989. The next prime is 331321009. The reversal of 331321001 is 100123133.

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 331321001 - 2¹⁸ = 331058857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331321009) 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, 319910 + ... + 320943.

It is an arithmetic number, because the mean of its divisors is an integer number (46141488).

Almost surely, 2^331321001 is an apocalyptic number.

It is an amenable number.

331321001 is a deficient number, since it is larger than the sum of its proper divisors (37810903).

331321001 is a wasteful number, since it uses less digits than its factorization.

331321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640911.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 331321001 is about 18202.2251661713. The cubic root of 331321001 is about 691.9631838310.

Adding to 331321001 its reverse (100123133), we get a palindrome (431444134).

The spelling of 331321001 in words is "three hundred thirty-one million, three hundred twenty-one thousand, one".