331411220 has 96 divisors (see below), whose sum is σ = 824608512. Its totient is φ = 109513728.

The previous prime is 331411219. The next prime is 331411229. The reversal of 331411220 is 22114133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331411229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 709427 + ... + 709893.

It is an arithmetic number, because the mean of its divisors is an integer number (8589672).

Almost surely, 2^331411220 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 331411220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412304256).

331411220 is an abundant number, since it is smaller than the sum of its proper divisors (493197292).

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

331411220 is a wasteful number, since it uses less digits than its factorization.

331411220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 331411220 is about 18204.7032384491. The cubic root of 331411220 is about 692.0259855256.

Adding to 331411220 its reverse (22114133), we get a palindrome (353525353).

The spelling of 331411220 in words is "three hundred thirty-one million, four hundred eleven thousand, two hundred twenty".