31220023030 has 16 divisors (see below), whose sum is σ = 64224047520. Its totient is φ = 10704007872.

The previous prime is 31220023001. The next prime is 31220023063. The reversal of 31220023030 is 3032002213.

It is a junction number, because it is equal to n+sod(n) for n = 31220022995 and 31220023013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223000095 + ... + 223000234.

It is an arithmetic number, because the mean of its divisors is an integer number (4014002970).

Almost surely, 2^31220023030 is an apocalyptic number.

31220023030 is an abundant number, since it is smaller than the sum of its proper divisors (33004024490).

31220023030 is a wasteful number, since it uses less digits than its factorization.

31220023030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446000343.

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

Adding to 31220023030 its reverse (3032002213), we get a palindrome (34252025243).

The spelling of 31220023030 in words is "thirty-one billion, two hundred twenty million, twenty-three thousand, thirty".