331040021404240 has 160 divisors (see below), whose sum is σ = 824963142908160. Its totient is φ = 123216904876032.

The previous prime is 331040021404159. The next prime is 331040021404271. The reversal of 331040021404240 is 42404120040133.

It is a junction number, because it is equal to n+sod(n) for n = 331040021404199 and 331040021404208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452979612 + ... + 453709828.

It is an arithmetic number, because the mean of its divisors is an integer number (5156019643176).

Almost surely, 2^{331040021404240} 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 331040021404240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412481571454080).

331040021404240 is an abundant number, since it is smaller than the sum of its proper divisors (493923121503920).

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

331040021404240 is a wasteful number, since it uses less digits than its factorization.

331040021404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736949 (or 736943 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 331040021404240 its reverse (42404120040133), we get a palindrome (373444141444373).

The spelling of 331040021404240 in words is "three hundred thirty-one trillion, forty billion, twenty-one million, four hundred four thousand, two hundred forty".