31330229989 has 2 divisors, whose sum is σ = 31330229990. Its totient is φ = 31330229988.

The previous prime is 31330229981. The next prime is 31330230031. The reversal of 31330229989 is 98992203313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22848740964 + 8481489025 = 151158^2 + 92095^2 .

It is a cyclic number.

It is not a de Polignac number, because 31330229989 - 2³ = 31330229981 is a prime.

It is a super-2 number, since 2×31330229989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31330229981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665114994 + 15665114995.

It is an arithmetic number, because the mean of its divisors is an integer number (15665114995).

Almost surely, 2^31330229989 is an apocalyptic number.

It is an amenable number.

31330229989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31330229989 is an equidigital number, since it uses as much as digits as its factorization.

31330229989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 31330229989 in words is "thirty-one billion, three hundred thirty million, two hundred twenty-nine thousand, nine hundred eighty-nine".