31200240109 has 2 divisors, whose sum is σ = 31200240110. Its totient is φ = 31200240108.

The previous prime is 31200240083. The next prime is 31200240133. The reversal of 31200240109 is 90104200213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27250746084 + 3949494025 = 165078^2 + 62845^2 .

It is a cyclic number.

It is not a de Polignac number, because 31200240109 - 2⁷ = 31200239981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31200240109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31200240139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600120054 + 15600120055.

It is an arithmetic number, because the mean of its divisors is an integer number (15600120055).

Almost surely, 2^31200240109 is an apocalyptic number.

It is an amenable number.

31200240109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31200240109 is an equidigital number, since it uses as much as digits as its factorization.

31200240109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 31200240109 in words is "thirty-one billion, two hundred million, two hundred forty thousand, one hundred nine".