31230130 has 32 divisors (see below), whose sum is σ = 57542400. Its totient is φ = 12200832.

The previous prime is 31230079. The next prime is 31230163. The reversal of 31230130 is 3103213.

It is a self number, because there is not a number n which added to its sum of digits gives 31230130.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130551 + ... + 130789.

It is an arithmetic number, because the mean of its divisors is an integer number (1798200).

Almost surely, 2^31230130 is an apocalyptic number.

31230130 is a deficient number, since it is larger than the sum of its proper divisors (26312270).

31230130 is a wasteful number, since it uses less digits than its factorization.

31230130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498.

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

The square root of 31230130 is about 5588.3924343231. The cubic root of 31230130 is about 314.9134893027.

Adding to 31230130 its reverse (3103213), we get a palindrome (34333343).

The spelling of 31230130 in words is "thirty-one million, two hundred thirty thousand, one hundred thirty".