501321505 has 12 divisors (see below), whose sum is σ = 614671380. Its totient is φ = 392515424.

The previous prime is 501321493. The next prime is 501321523. The reversal of 501321505 is 505123105.

It can be written as a sum of positive squares in 2 ways, for example, as 273703936 + 227617569 = 16544^2 + 15087^2 .

It is not a de Polignac number, because 501321505 - 2⁹ = 501320993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11650 + ... + 33739.

It is an arithmetic number, because the mean of its divisors is an integer number (51222615).

Almost surely, 2^501321505 is an apocalyptic number.

It is an amenable number.

501321505 is a deficient number, since it is larger than the sum of its proper divisors (113349875).

501321505 is an equidigital number, since it uses as much as digits as its factorization.

501321505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45488 (or 45441 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 501321505 is about 22390.2100258126. The cubic root of 501321505 is about 794.3991636521.

The spelling of 501321505 in words is "five hundred one million, three hundred twenty-one thousand, five hundred five".