31143428106 has 64 divisors (see below), whose sum is σ = 73743022080. Its totient is φ = 8579229120.

The previous prime is 31143428081. The next prime is 31143428123. The reversal of 31143428106 is 60182434113.

It is a super-2 number, since 2×31143428106² (a number of 22 digits) contains 22 as substring.

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, 867901 + ... + 903071.

It is an arithmetic number, because the mean of its divisors is an integer number (1152234720).

Almost surely, 2^31143428106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31143428106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36871511040).

31143428106 is an abundant number, since it is smaller than the sum of its proper divisors (42599593974).

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

31143428106 is a wasteful number, since it uses less digits than its factorization.

31143428106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35939.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 31143428106 in words is "thirty-one billion, one hundred forty-three million, four hundred twenty-eight thousand, one hundred six".