505144030221 has 24 divisors (see below), whose sum is σ = 740155328640. Its totient is φ = 331918120800.

The previous prime is 505144030207. The next prime is 505144030273. The reversal of 505144030221 is 122030441505.

It is not a de Polignac number, because 505144030221 - 2⁷ = 505144030093 is a prime.

It is a super-2 number, since 2×505144030221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505144030621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2001751 + ... + 2239931.

It is an arithmetic number, because the mean of its divisors is an integer number (30839805360).

Almost surely, 2^505144030221 is an apocalyptic number.

It is an amenable number.

505144030221 is a deficient number, since it is larger than the sum of its proper divisors (235011298419).

505144030221 is a wasteful number, since it uses less digits than its factorization.

505144030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241577 (or 241574 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 505144030221 its reverse (122030441505), we get a palindrome (627174471726).

The spelling of 505144030221 in words is "five hundred five billion, one hundred forty-four million, thirty thousand, two hundred twenty-one".