331640010 has 96 divisors (see below), whose sum is σ = 935822160. Its totient is φ = 80999424.

The previous prime is 331640009. The next prime is 331640039. The reversal of 331640010 is 10046133.

It can be written as a sum of positive squares in 8 ways, for example, as 44235801 + 287404209 = 6651^2 + 16953^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159256 + ... + 161324.

Almost surely, 2^331640010 is an apocalyptic number.

331640010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 331640010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467911080).

331640010 is an abundant number, since it is smaller than the sum of its proper divisors (604182150).

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

331640010 is a wasteful number, since it uses less digits than its factorization.

331640010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331640010 is about 18210.9859700127. The cubic root of 331640010 is about 692.1851957912.

Adding to 331640010 its reverse (10046133), we get a palindrome (341686143).

The spelling of 331640010 in words is "three hundred thirty-one million, six hundred forty thousand, ten".