31020232109 has 2 divisors, whose sum is σ = 31020232110. Its totient is φ = 31020232108.

The previous prime is 31020232099. The next prime is 31020232157. The reversal of 31020232109 is 90123202013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20893835209 + 10126396900 = 144547^2 + 100630^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020232109 - 2⁴ = 31020232093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020232169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510116054 + 15510116055.

It is an arithmetic number, because the mean of its divisors is an integer number (15510116055).

Almost surely, 2^31020232109 is an apocalyptic number.

It is an amenable number.

31020232109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020232109 is an equidigital number, since it uses as much as digits as its factorization.

31020232109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 31020232109 in words is "thirty-one billion, twenty million, two hundred thirty-two thousand, one hundred nine".