30311232137 has 2 divisors, whose sum is σ = 30311232138. Its totient is φ = 30311232136.

The previous prime is 30311232059. The next prime is 30311232163. The reversal of 30311232137 is 73123211303.

It is an a-pointer prime, because the next prime (30311232163) can be obtained adding 30311232137 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23312403856 + 6998828281 = 152684^2 + 83659^2 .

It is a cyclic number.

It is not a de Polignac number, because 30311232137 - 2¹² = 30311228041 is a prime.

It is not a weakly prime, because it can be changed into another prime (30311232037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155616068 + 15155616069.

It is an arithmetic number, because the mean of its divisors is an integer number (15155616069).

Almost surely, 2^30311232137 is an apocalyptic number.

It is an amenable number.

30311232137 is a deficient number, since it is larger than the sum of its proper divisors (1).

30311232137 is an equidigital number, since it uses as much as digits as its factorization.

30311232137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

The spelling of 30311232137 in words is "thirty billion, three hundred eleven million, two hundred thirty-two thousand, one hundred thirty-seven".