31023130000 has 100 divisors (see below), whose sum is σ = 79528777020. Its totient is φ = 11679232000.

The previous prime is 31023129979. The next prime is 31023130009. The reversal of 31023130000 is 3132013.

It can be written as a sum of positive squares in 10 ways, for example, as 27991966864 + 3031163136 = 167308^2 + 55056^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is not an unprimeable number, because it can be changed into a prime (31023130009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 78756 + ... + 261244.

Almost surely, 2^31023130000 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 31023130000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39764388510).

31023130000 is an abundant number, since it is smaller than the sum of its proper divisors (48505647020).

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

31023130000 is a wasteful number, since it uses less digits than its factorization.

31023130000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182534 (or 182513 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 31023130000 its reverse (3132013), we get a palindrome (31026262013).

The spelling of 31023130000 in words is "thirty-one billion, twenty-three million, one hundred thirty thousand".