31223123030 has 64 divisors (see below), whose sum is σ = 63546500160. Its totient is φ = 10945497600.

The previous prime is 31223123021. The next prime is 31223123033. The reversal of 31223123030 is 3032132213.

It is a junction number, because it is equal to n+sod(n) for n = 31223122993 and 31223123011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223123033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408440 + ... + 478820.

It is an arithmetic number, because the mean of its divisors is an integer number (992914065).

Almost surely, 2^31223123030 is an apocalyptic number.

31223123030 is an abundant number, since it is smaller than the sum of its proper divisors (32323377130).

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

31223123030 is a wasteful number, since it uses less digits than its factorization.

31223123030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70545.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31223123030 its reverse (3032132213), we get a palindrome (34255255243).

The spelling of 31223123030 in words is "thirty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, thirty".