305240520031 has 2 divisors, whose sum is σ = 305240520032. Its totient is φ = 305240520030.

The previous prime is 305240520007. The next prime is 305240520047. The reversal of 305240520031 is 130025042503.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 305240520031 - 2²⁹ = 304703649119 is a prime.

It is a super-2 number, since 2×305240520031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 305240519978 and 305240520005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305240520061) 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, 152620260015 + 152620260016.

It is an arithmetic number, because the mean of its divisors is an integer number (152620260016).

Almost surely, 2^305240520031 is an apocalyptic number.

305240520031 is a deficient number, since it is larger than the sum of its proper divisors (1).

305240520031 is an equidigital number, since it uses as much as digits as its factorization.

305240520031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 305240520031 its reverse (130025042503), we get a palindrome (435265562534).

The spelling of 305240520031 in words is "three hundred five billion, two hundred forty million, five hundred twenty thousand, thirty-one".