31258000000 has 112 divisors (see below), whose sum is σ = 77843730150. Its totient is φ = 12502400000.

The previous prime is 31257999989. The next prime is 31258000061. The reversal of 31258000000 is 85213.

It is a happy number.

It can be written as a sum of positive squares in 7 ways, for example, as 5711731776 + 25546268224 = 75576^2 + 159832^2 .

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 13 ways as a sum of consecutive naturals, for example, 1992186 + ... + 2007814.

Almost surely, 2^31258000000 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 31258000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38921865075).

31258000000 is an abundant number, since it is smaller than the sum of its proper divisors (46585730150).

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

31258000000 is an frugal number, since it uses more digits than its factorization.

31258000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15673 (or 15636 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 31258000000 its reverse (85213), we get a palindrome (31258085213).

The spelling of 31258000000 in words is "thirty-one billion, two hundred fifty-eight million", and thus it is an aban number.