31020130289 has 2 divisors, whose sum is σ = 31020130290. Its totient is φ = 31020130288.

The previous prime is 31020130223. The next prime is 31020130313. The reversal of 31020130289 is 98203102013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27417729889 + 3602400400 = 165583^2 + 60020^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020130289 - 2³² = 26725162993 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020130789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510065144 + 15510065145.

It is an arithmetic number, because the mean of its divisors is an integer number (15510065145).

Almost surely, 2^31020130289 is an apocalyptic number.

It is an amenable number.

31020130289 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020130289 is an equidigital number, since it uses as much as digits as its factorization.

31020130289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 31020130289 in words is "thirty-one billion, twenty million, one hundred thirty thousand, two hundred eighty-nine".