30007172731 has 2 divisors, whose sum is σ = 30007172732. Its totient is φ = 30007172730.

The previous prime is 30007172711. The next prime is 30007172749. The reversal of 30007172731 is 13727170003.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30007172731 - 2⁷ = 30007172603 is a prime.

It is a super-2 number, since 2×30007172731² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30007172693 and 30007172702.

It is not a weakly prime, because it can be changed into another prime (30007172711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15003586365 + 15003586366.

It is an arithmetic number, because the mean of its divisors is an integer number (15003586366).

Almost surely, 2^30007172731 is an apocalyptic number.

30007172731 is a deficient number, since it is larger than the sum of its proper divisors (1).

30007172731 is an equidigital number, since it uses as much as digits as its factorization.

30007172731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6174, while the sum is 31.

The spelling of 30007172731 in words is "thirty billion, seven million, one hundred seventy-two thousand, seven hundred thirty-one".