31020030131309 has 2 divisors, whose sum is σ = 31020030131310. Its totient is φ = 31020030131308.

The previous prime is 31020030131291. The next prime is 31020030131341. The reversal of 31020030131309 is 90313103002013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27317399826025 + 3702630305284 = 5226605^2 + 1924222^2 .

It is an emirp because it is prime and its reverse (90313103002013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31020030131309 - 2²⁴ = 31020013354093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020030131399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510015065654 + 15510015065655.

It is an arithmetic number, because the mean of its divisors is an integer number (15510015065655).

Almost surely, 2^{31020030131309} is an apocalyptic number.

It is an amenable number.

31020030131309 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020030131309 is an equidigital number, since it uses as much as digits as its factorization.

31020030131309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

The spelling of 31020030131309 in words is "thirty-one trillion, twenty billion, thirty million, one hundred thirty-one thousand, three hundred nine".