331030221 has 8 divisors (see below), whose sum is σ = 441484800. Its totient is φ = 220631232.

The previous prime is 331030213. The next prime is 331030247. The reversal of 331030221 is 122030133.

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

It is not a de Polignac number, because 331030221 - 2³ = 331030213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331030201) 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, 2901 + ... + 25893.

It is an arithmetic number, because the mean of its divisors is an integer number (55185600).

Almost surely, 2^331030221 is an apocalyptic number.

It is an amenable number.

331030221 is a deficient number, since it is larger than the sum of its proper divisors (110454579).

331030221 is a wasteful number, since it uses less digits than its factorization.

331030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27795.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 331030221 is about 18194.2359278976. The cubic root of 331030221 is about 691.7606934510.

Adding to 331030221 its reverse (122030133), we get a palindrome (453060354).

The spelling of 331030221 in words is "three hundred thirty-one million, thirty thousand, two hundred twenty-one".