31203230130 has 128 divisors (see below), whose sum is σ = 88220160000. Its totient is φ = 7826030784.

The previous prime is 31203230087. The next prime is 31203230131. The reversal of 31203230130 is 3103230213.

31203230130 is a `hidden beast` number, since 312 + 0 + 323 + 0 + 1 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31203230131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 691191 + ... + 734949.

It is an arithmetic number, because the mean of its divisors is an integer number (689220000).

Almost surely, 2^31203230130 is an apocalyptic number.

31203230130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31203230130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44110080000).

31203230130 is an abundant number, since it is smaller than the sum of its proper divisors (57016929870).

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

31203230130 is a wasteful number, since it uses less digits than its factorization.

31203230130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43933 (or 43927 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31203230130 its reverse (3103230213), we get a palindrome (34306460343).

The spelling of 31203230130 in words is "thirty-one billion, two hundred three million, two hundred thirty thousand, one hundred thirty".