42031431312 has 160 divisors (see below), whose sum is σ = 124243797888. Its totient is φ = 12129558528.

The previous prime is 42031431293. The next prime is 42031431359. The reversal of 42031431312 is 21313413024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 3101383 + ... + 3114905.

Almost surely, 2^42031431312 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 42031431312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62121898944).

42031431312 is an abundant number, since it is smaller than the sum of its proper divisors (82212366576).

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

42031431312 is a wasteful number, since it uses less digits than its factorization.

42031431312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13857 (or 13851 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 42031431312 its reverse (21313413024), we get a palindrome (63344844336).

The spelling of 42031431312 in words is "forty-two billion, thirty-one million, four hundred thirty-one thousand, three hundred twelve".