31100143309 has 2 divisors, whose sum is σ = 31100143310. Its totient is φ = 31100143308.

The previous prime is 31100143303. The next prime is 31100143337. The reversal of 31100143309 is 90334100113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30817802500 + 282340809 = 175550^2 + 16803^2 .

It is a cyclic number.

It is not a de Polignac number, because 31100143309 - 2¹³ = 31100135117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31100143303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15550071654 + 15550071655.

It is an arithmetic number, because the mean of its divisors is an integer number (15550071655).

Almost surely, 2^31100143309 is an apocalyptic number.

It is an amenable number.

31100143309 is a deficient number, since it is larger than the sum of its proper divisors (1).

31100143309 is an equidigital number, since it uses as much as digits as its factorization.

31100143309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 31100143309 in words is "thirty-one billion, one hundred million, one hundred forty-three thousand, three hundred nine".