31030103331209 has 4 divisors (see below), whose sum is σ = 31030209113604. Its totient is φ = 31029997548816.

The previous prime is 31030103331197. The next prime is 31030103331221. The reversal of 31030103331209 is 90213330103013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (31030103331197) and next prime (31030103331221).

It can be written as a sum of positive squares in 2 ways, for example, as 4102358583184 + 26927744748025 = 2025428^2 + 5189195^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030103331209 - 2²⁴ = 31030086553993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31030103331289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52449962 + ... + 53038275.

It is an arithmetic number, because the mean of its divisors is an integer number (7757552278401).

Almost surely, 2^{31030103331209} is an apocalyptic number.

It is an amenable number.

31030103331209 is a deficient number, since it is larger than the sum of its proper divisors (105782395).

31030103331209 is a wasteful number, since it uses less digits than its factorization.

31030103331209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105782394.

The product of its (nonzero) digits is 4374, while the sum is 29.

The spelling of 31030103331209 in words is "thirty-one trillion, thirty billion, one hundred three million, three hundred thirty-one thousand, two hundred nine".