31230020311 has 32 divisors (see below), whose sum is σ = 37278766080. Its totient is φ = 25604812800.

The previous prime is 31230020257. The next prime is 31230020317. The reversal of 31230020311 is 11302003213.

It is not a de Polignac number, because 31230020311 - 2⁷ = 31230020183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230020317) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6967191 + ... + 6971671.

It is an arithmetic number, because the mean of its divisors is an integer number (1164961440).

Almost surely, 2^31230020311 is an apocalyptic number.

31230020311 is a deficient number, since it is larger than the sum of its proper divisors (6048745769).

31230020311 is a wasteful number, since it uses less digits than its factorization.

31230020311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31230020311 its reverse (11302003213), we get a palindrome (42532023524).

The spelling of 31230020311 in words is "thirty-one billion, two hundred thirty million, twenty thousand, three hundred eleven".