31261472112 has 160 divisors (see below), whose sum is σ = 89486994688. Its totient is φ = 9344636928.

The previous prime is 31261472101. The next prime is 31261472129. The reversal of 31261472112 is 21127416213.

It is a self number, because there is not a number n which added to its sum of digits gives 31261472112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3046863 + ... + 3057105.

Almost surely, 2^31261472112 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 31261472112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44743497344).

31261472112 is an abundant number, since it is smaller than the sum of its proper divisors (58225522576).

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

31261472112 is a wasteful number, since it uses less digits than its factorization.

31261472112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407 (or 10401 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

Adding to 31261472112 its reverse (21127416213), we get a palindrome (52388888325).

The spelling of 31261472112 in words is "thirty-one billion, two hundred sixty-one million, four hundred seventy-two thousand, one hundred twelve".