30311133157 has 2 divisors, whose sum is σ = 30311133158. Its totient is φ = 30311133156.

The previous prime is 30311133113. The next prime is 30311133163. The reversal of 30311133157 is 75133111303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24897999681 + 5413133476 = 157791^2 + 73574^2 .

It is an emirp because it is prime and its reverse (75133111303) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30311133157 is a prime.

It is a super-2 number, since 2×30311133157² (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 (30311133197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155566578 + 15155566579.

It is an arithmetic number, because the mean of its divisors is an integer number (15155566579).

Almost surely, 2^30311133157 is an apocalyptic number.

It is an amenable number.

30311133157 is a deficient number, since it is larger than the sum of its proper divisors (1).

30311133157 is an equidigital number, since it uses as much as digits as its factorization.

30311133157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 28.

The spelling of 30311133157 in words is "thirty billion, three hundred eleven million, one hundred thirty-three thousand, one hundred fifty-seven".