30621251317 has 2 divisors, whose sum is σ = 30621251318. Its totient is φ = 30621251316.

The previous prime is 30621251303. The next prime is 30621251329. The reversal of 30621251317 is 71315212603.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24207003396 + 6414247921 = 155586^2 + 80089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30621251317 is a prime.

It is a super-2 number, since 2×30621251317² (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 (30621251387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15310625658 + 15310625659.

It is an arithmetic number, because the mean of its divisors is an integer number (15310625659).

Almost surely, 2^30621251317 is an apocalyptic number.

It is an amenable number.

30621251317 is a deficient number, since it is larger than the sum of its proper divisors (1).

30621251317 is an equidigital number, since it uses as much as digits as its factorization.

30621251317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 30621251317 in words is "thirty billion, six hundred twenty-one million, two hundred fifty-one thousand, three hundred seventeen".