31223230 has 16 divisors (see below), whose sum is σ = 56377584. Its totient is φ = 12450240.

The previous prime is 31223219. The next prime is 31223239. The reversal of 31223230 is 3232213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1407 + ... + 8026.

It is an arithmetic number, because the mean of its divisors is an integer number (3523599).

Almost surely, 2^31223230 is an apocalyptic number.

31223230 is a deficient number, since it is larger than the sum of its proper divisors (25154354).

31223230 is a wasteful number, since it uses less digits than its factorization.

31223230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9771.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 31223230 is about 5587.7750491587. The cubic root of 31223230 is about 314.8902952150.

Adding to 31223230 its reverse (3232213), we get a palindrome (34455443).

The spelling of 31223230 in words is "thirty-one million, two hundred twenty-three thousand, two hundred thirty".