31143021130 has 48 divisors (see below), whose sum is σ = 61376390712. Its totient is φ = 11310278400.

The previous prime is 31143021097. The next prime is 31143021139. The reversal of 31143021130 is 3112034113.

It can be written as a sum of positive squares in 12 ways, for example, as 3623197249 + 27519823881 = 60193^2 + 165891^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31143021098 and 31143021107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143021139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 451540 + ... + 515920.

Almost surely, 2^31143021130 is an apocalyptic number.

31143021130 is a deficient number, since it is larger than the sum of its proper divisors (30233369582).

31143021130 is a wasteful number, since it uses less digits than its factorization.

31143021130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64523 (or 64462 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31143021130 its reverse (3112034113), we get a palindrome (34255055243).

The spelling of 31143021130 in words is "thirty-one billion, one hundred forty-three million, twenty-one thousand, one hundred thirty".