31130746 has 16 divisors (see below), whose sum is σ = 49033440. Its totient is φ = 14802480.

The previous prime is 31130741. The next prime is 31130747. The reversal of 31130746 is 64703113.

It is a self number, because there is not a number n which added to its sum of digits gives 31130746.

It is not an unprimeable number, because it can be changed into a prime (31130741) 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 7 ways as a sum of consecutive naturals, for example, 120 + ... + 7891.

It is an arithmetic number, because the mean of its divisors is an integer number (3064590).

Almost surely, 2^31130746 is an apocalyptic number.

31130746 is a deficient number, since it is larger than the sum of its proper divisors (17902694).

31130746 is a wasteful number, since it uses less digits than its factorization.

31130746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 31130746 is about 5579.4933461740. The cubic root of 31130746 is about 314.5790833902.

Adding to 31130746 its reverse (64703113), we get a palindrome (95833859).

The spelling of 31130746 in words is "thirty-one million, one hundred thirty thousand, seven hundred forty-six".