31304131289 has 2 divisors, whose sum is σ = 31304131290. Its totient is φ = 31304131288.

The previous prime is 31304131273. The next prime is 31304131307. The reversal of 31304131289 is 98213140313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30310810000 + 993321289 = 174100^2 + 31517^2 .

It is a cyclic number.

It is not a de Polignac number, because 31304131289 - 2⁴ = 31304131273 is a prime.

It is not a weakly prime, because it can be changed into another prime (31304131259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15652065644 + 15652065645.

It is an arithmetic number, because the mean of its divisors is an integer number (15652065645).

Almost surely, 2^31304131289 is an apocalyptic number.

It is an amenable number.

31304131289 is a deficient number, since it is larger than the sum of its proper divisors (1).

31304131289 is an equidigital number, since it uses as much as digits as its factorization.

31304131289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 31304131289 in words is "thirty-one billion, three hundred four million, one hundred thirty-one thousand, two hundred eighty-nine".