31031230 has 16 divisors (see below), whose sum is σ = 55919664. Its totient is φ = 12398400.

The previous prime is 31031201. The next prime is 31031257. The reversal of 31031230 is 3213013.

It is a self number, because there is not a number n which added to its sum of digits gives 31031230.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16330 + ... + 18130.

It is an arithmetic number, because the mean of its divisors is an integer number (3494979).

Almost surely, 2^31031230 is an apocalyptic number.

31031230 is a deficient number, since it is larger than the sum of its proper divisors (24888434).

31031230 is a wasteful number, since it uses less digits than its factorization.

31031230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531.

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

The square root of 31031230 is about 5570.5681936406. The cubic root of 31031230 is about 314.2435194239.

Adding to 31031230 its reverse (3213013), we get a palindrome (34244243).

The spelling of 31031230 in words is "thirty-one million, thirty-one thousand, two hundred thirty".