331220001 has 8 divisors (see below), whose sum is σ = 504716224. Its totient is φ = 189268560.

The previous prime is 331219979. The next prime is 331220009. The reversal of 331220001 is 100022133.

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 331220001 - 2⁷ = 331219873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331220009) 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, 7886170 + ... + 7886211.

It is an arithmetic number, because the mean of its divisors is an integer number (63089528).

Almost surely, 2^331220001 is an apocalyptic number.

It is an amenable number.

331220001 is a deficient number, since it is larger than the sum of its proper divisors (173496223).

331220001 is a wasteful number, since it uses less digits than its factorization.

331220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15772391.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 331220001 is about 18199.4505686298. The cubic root of 331220001 is about 691.8928639256.

Adding to 331220001 its reverse (100022133), we get a palindrome (431242134).

The spelling of 331220001 in words is "three hundred thirty-one million, two hundred twenty thousand, one".