331144427136 has 64 divisors (see below), whose sum is σ = 891991224000. Its totient is φ = 108826798080.

The previous prime is 331144427129. The next prime is 331144427143. The reversal of 331144427136 is 631724441133.

It is a happy number.

331144427136 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (331144427129) and next prime (331144427143).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×331144427136² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331144427094 and 331144427103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6045661 + ... + 6100188.

It is an arithmetic number, because the mean of its divisors is an integer number (13937362875).

Almost surely, 2^331144427136 is an apocalyptic number.

It is an amenable number.

331144427136 is an abundant number, since it is smaller than the sum of its proper divisors (560846796864).

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

331144427136 is a wasteful number, since it uses less digits than its factorization.

331144427136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12145937 (or 12145925 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

Adding to 331144427136 its reverse (631724441133), we get a palindrome (962868868269).

The spelling of 331144427136 in words is "three hundred thirty-one billion, one hundred forty-four million, four hundred twenty-seven thousand, one hundred thirty-six".