31220000030 has 32 divisors (see below), whose sum is σ = 59603203296. Its totient is φ = 11733351424.

The previous prime is 31220000023. The next prime is 31220000069. The reversal of 31220000030 is 3000002213.

It is a junction number, because it is equal to n+sod(n) for n = 31219999966 and 31220000020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56639 + ... + 256218.

It is an arithmetic number, because the mean of its divisors is an integer number (1862600103).

Almost surely, 2^31220000030 is an apocalyptic number.

31220000030 is a deficient number, since it is larger than the sum of its proper divisors (28383203266).

31220000030 is a wasteful number, since it uses less digits than its factorization.

31220000030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313468.

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 31220000030 its reverse (3000002213), we get a palindrome (34220002243).

The spelling of 31220000030 in words is "thirty-one billion, two hundred twenty million, thirty", and thus it is an aban number.