31140230 has 16 divisors (see below), whose sum is σ = 61148304. Its totient is φ = 11323680.

The previous prime is 31140191. The next prime is 31140233. The reversal of 31140230 is 3204113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140233) 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, 141437 + ... + 141656.

It is an arithmetic number, because the mean of its divisors is an integer number (3821769).

Almost surely, 2^31140230 is an apocalyptic number.

31140230 is a deficient number, since it is larger than the sum of its proper divisors (30008074).

31140230 is a wasteful number, since it uses less digits than its factorization.

31140230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283111.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31140230 is about 5580.3431794111. The cubic root of 31140230 is about 314.6110257140.

Adding to 31140230 its reverse (3204113), we get a palindrome (34344343).

The spelling of 31140230 in words is "thirty-one million, one hundred forty thousand, two hundred thirty".