331020109 has 16 divisors (see below), whose sum is σ = 398736000. Its totient is φ = 268449984.

The previous prime is 331020097. The next prime is 331020119. The reversal of 331020109 is 901020133.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331020109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331020119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168867 + ... + 170815.

It is an arithmetic number, because the mean of its divisors is an integer number (24921000).

Almost surely, 2^331020109 is an apocalyptic number.

It is an amenable number.

331020109 is a deficient number, since it is larger than the sum of its proper divisors (67715891).

331020109 is a wasteful number, since it uses less digits than its factorization.

331020109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 331020109 is about 18193.9580355677. The cubic root of 331020109 is about 691.7536496275.

The spelling of 331020109 in words is "three hundred thirty-one million, twenty thousand, one hundred nine".