501223205387 has 2 divisors, whose sum is σ = 501223205388. Its totient is φ = 501223205386.

The previous prime is 501223205369. The next prime is 501223205447. The reversal of 501223205387 is 783502322105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501223205387 - 2⁶ = 501223205323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501223205387.

It is not a weakly prime, because it can be changed into another prime (501223205347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250611602693 + 250611602694.

It is an arithmetic number, because the mean of its divisors is an integer number (250611602694).

Almost surely, 2^501223205387 is an apocalyptic number.

501223205387 is a deficient number, since it is larger than the sum of its proper divisors (1).

501223205387 is an equidigital number, since it uses as much as digits as its factorization.

501223205387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 501223205387 in words is "five hundred one billion, two hundred twenty-three million, two hundred five thousand, three hundred eighty-seven".