31125130 has 16 divisors (see below), whose sum is σ = 59321160. Its totient is φ = 11717632.

The previous prime is 31125121. The next prime is 31125161. The reversal of 31125130 is 3152113.

It can be written as a sum of positive squares in 4 ways, for example, as 24910081 + 6215049 = 4991^2 + 2493^2 .

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, 91375 + ... + 91714.

Almost surely, 2^31125130 is an apocalyptic number.

31125130 is a deficient number, since it is larger than the sum of its proper divisors (28196030).

31125130 is a wasteful number, since it uses less digits than its factorization.

31125130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183113.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 31125130 is about 5578.9900519718. The cubic root of 31125130 is about 314.5601655185.

Adding to 31125130 its reverse (3152113), we get a palindrome (34277243).

The spelling of 31125130 in words is "thirty-one million, one hundred twenty-five thousand, one hundred thirty".