31130222231000 has 512 divisors, whose sum is σ = 84129982560000. Its totient is φ = 10701921484800.

The previous prime is 31130222230993. The next prime is 31130222231011. The reversal of 31130222231000 is 13222203113.

It is a super-2 number, since 2×31130222231000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6341456546 + ... + 6341461454.

Almost surely, 2^{31130222231000} 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 31130222231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42064991280000).

31130222231000 is an abundant number, since it is smaller than the sum of its proper divisors (52999760329000).

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

31130222231000 is a wasteful number, since it uses less digits than its factorization.

31130222231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672 (or 5658 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31130222231000 its reverse (13222203113), we get a palindrome (31143444434113).

The spelling of 31130222231000 in words is "thirty-one trillion, one hundred thirty billion, two hundred twenty-two million, two hundred thirty-one thousand".