31012331460 has 144 divisors (see below), whose sum is σ = 98738136000. Its totient is φ = 7258845440.

The previous prime is 31012331419. The next prime is 31012331461. The reversal of 31012331460 is 6413321013.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31012331460.

It is not an unprimeable number, because it can be changed into a prime (31012331461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 136891 + ... + 284189.

It is an arithmetic number, because the mean of its divisors is an integer number (685681500).

Almost surely, 2^31012331460 is an apocalyptic number.

31012331460 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31012331460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49369068000).

31012331460 is an abundant number, since it is smaller than the sum of its proper divisors (67725804540).

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

31012331460 is a wasteful number, since it uses less digits than its factorization.

31012331460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147362 (or 147349 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31012331460 its reverse (6413321013), we get a palindrome (37425652473).

The spelling of 31012331460 in words is "thirty-one billion, twelve million, three hundred thirty-one thousand, four hundred sixty".