31203031130 has 16 divisors (see below), whose sum is σ = 56168466120. Its totient is φ = 12480543552.

The previous prime is 31203031129. The next prime is 31203031177. The reversal of 31203031130 is 3113030213.

It can be written as a sum of positive squares in 4 ways, for example, as 27260321449 + 3942709681 = 165107^2 + 62791^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31203031099 and 31203031108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141056 + ... + 286884.

Almost surely, 2^31203031130 is an apocalyptic number.

31203031130 is a deficient number, since it is larger than the sum of its proper divisors (24965434990).

31203031130 is a wasteful number, since it uses less digits than its factorization.

31203031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167233.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31203031130 its reverse (3113030213), we get a palindrome (34316061343).

The spelling of 31203031130 in words is "thirty-one billion, two hundred three million, thirty-one thousand, one hundred thirty".