1501320563 has 2 divisors, whose sum is σ = 1501320564. Its totient is φ = 1501320562.

The previous prime is 1501320521. The next prime is 1501320581. The reversal of 1501320563 is 3650231051.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1501320563 - 2⁸ = 1501320307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1501320763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750660281 + 750660282.

It is an arithmetic number, because the mean of its divisors is an integer number (750660282).

Almost surely, 2^1501320563 is an apocalyptic number.

1501320563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501320563 is an equidigital number, since it uses as much as digits as its factorization.

1501320563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1501320563 is about 38746.8781065004. The cubic root of 1501320563 is about 1145.0500700821.

The spelling of 1501320563 in words is "one billion, five hundred one million, three hundred twenty thousand, five hundred sixty-three".