31130770 has 16 divisors (see below), whose sum is σ = 61129728. Its totient is φ = 11320240.

The previous prime is 31130747. The next prime is 31130783. The reversal of 31130770 is 7703113.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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, 141394 + ... + 141613.

It is an arithmetic number, because the mean of its divisors is an integer number (3820608).

Almost surely, 2^31130770 is an apocalyptic number.

31130770 is a deficient number, since it is larger than the sum of its proper divisors (29998958).

31130770 is a wasteful number, since it uses less digits than its factorization.

31130770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283025.

The product of its (nonzero) digits is 441, while the sum is 22.

The square root of 31130770 is about 5579.4954969065. The cubic root of 31130770 is about 314.5791642309.

Adding to 31130770 its reverse (7703113), we get a palindrome (38833883).

The spelling of 31130770 in words is "thirty-one million, one hundred thirty thousand, seven hundred seventy".