31032130 has 16 divisors (see below), whose sum is σ = 58798080. Its totient is φ = 11759472.

The previous prime is 31032097. The next prime is 31032139. The reversal of 31032130 is 3123013.

It is a self number, because there is not a number n which added to its sum of digits gives 31032130.

It is not an unprimeable number, because it can be changed into a prime (31032139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81474 + ... + 81853.

It is an arithmetic number, because the mean of its divisors is an integer number (3674880).

Almost surely, 2^31032130 is an apocalyptic number.

31032130 is a deficient number, since it is larger than the sum of its proper divisors (27765950).

31032130 is a wasteful number, since it uses less digits than its factorization.

31032130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163353.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 31032130 is about 5570.6489747605. The cubic root of 31032130 is about 314.2465574003.

Adding to 31032130 its reverse (3123013), we get a palindrome (34155143).

The spelling of 31032130 in words is "thirty-one million, thirty-two thousand, one hundred thirty".