31023230320 has 40 divisors (see below), whose sum is σ = 72267021936. Its totient is φ = 12385548288.

The previous prime is 31023230311. The next prime is 31023230321. The reversal of 31023230320 is 2303232013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023230321) 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, 328897 + ... + 412576.

Almost surely, 2^31023230320 is an apocalyptic number.

It is an amenable number.

31023230320 is an abundant number, since it is smaller than the sum of its proper divisors (41243791616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31023230320 is a wasteful number, since it uses less digits than its factorization.

31023230320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742009 (or 742003 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 31023230320 its reverse (2303232013), we get a palindrome (33326462333).

The spelling of 31023230320 in words is "thirty-one billion, twenty-three million, two hundred thirty thousand, three hundred twenty".