505013030721 has 16 divisors (see below), whose sum is σ = 748198192320. Its totient is φ = 336661521120.

The previous prime is 505013030659. The next prime is 505013030729. The reversal of 505013030721 is 127030310505.

505013030721 is a `hidden beast` number, since 505 + 0 + 130 + 3 + 0 + 7 + 21 = 666.

It is not a de Polignac number, because 505013030721 - 2⁶ = 505013030657 is a prime.

It is a super-2 number, since 2×505013030721² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (505013030729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307741 + ... + 1051061.

It is an arithmetic number, because the mean of its divisors is an integer number (46762387020).

Almost surely, 2^505013030721 is an apocalyptic number.

It is an amenable number.

505013030721 is a deficient number, since it is larger than the sum of its proper divisors (243185161599).

505013030721 is a wasteful number, since it uses less digits than its factorization.

505013030721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768493 (or 768487 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The spelling of 505013030721 in words is "five hundred five billion, thirteen million, thirty thousand, seven hundred twenty-one".