30231231997 has 2 divisors, whose sum is σ = 30231231998. Its totient is φ = 30231231996.

The previous prime is 30231231977. The next prime is 30231232067. The reversal of 30231231997 is 79913213203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19418143801 + 10813088196 = 139349^2 + 103986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30231231997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30231231967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115615998 + 15115615999.

It is an arithmetic number, because the mean of its divisors is an integer number (15115615999).

Almost surely, 2^30231231997 is an apocalyptic number.

It is an amenable number.

30231231997 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231231997 is an equidigital number, since it uses as much as digits as its factorization.

30231231997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 40.

The spelling of 30231231997 in words is "thirty billion, two hundred thirty-one million, two hundred thirty-one thousand, nine hundred ninety-seven".