31130223030 has 96 divisors (see below), whose sum is σ = 86548614048. Its totient is φ = 7735680000.

The previous prime is 31130222989. The next prime is 31130223031. The reversal of 31130223030 is 3032203113.

31130223030 is a `hidden beast` number, since 311 + 30 + 22 + 303 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 31130222994 and 31130223012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130223031) 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, 53805 + ... + 255255.

It is an arithmetic number, because the mean of its divisors is an integer number (901548063).

Almost surely, 2^31130223030 is an apocalyptic number.

31130223030 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 31130223030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43274307024).

31130223030 is an abundant number, since it is smaller than the sum of its proper divisors (55418391018).

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

31130223030 is a wasteful number, since it uses less digits than its factorization.

31130223030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201582 (or 201579 counting only the distinct ones).

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

Adding to 31130223030 its reverse (3032203113), we get a palindrome (34162426143).

The spelling of 31130223030 in words is "thirty-one billion, one hundred thirty million, two hundred twenty-three thousand, thirty".