31323230 has 8 divisors (see below), whose sum is σ = 56381832. Its totient is φ = 12529288.

The previous prime is 31323223. The next prime is 31323251. The reversal of 31323230 is 3232313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31323230² = 1962289475265800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323199 and 31323208.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1566152 + ... + 1566171.

It is an arithmetic number, because the mean of its divisors is an integer number (7047729).

Almost surely, 2^31323230 is an apocalyptic number.

31323230 is a deficient number, since it is larger than the sum of its proper divisors (25058602).

31323230 is a wasteful number, since it uses less digits than its factorization.

31323230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132330.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 31323230 is about 5596.7160013708. The cubic root of 31323230 is about 315.2261079214.

Adding to 31323230 its reverse (3232313), we get a palindrome (34555543).

The spelling of 31323230 in words is "thirty-one million, three hundred twenty-three thousand, two hundred thirty".