505057021 has 8 divisors (see below), whose sum is σ = 577728320. Its totient is φ = 432515808.

The previous prime is 505056989. The next prime is 505057043. The reversal of 505057021 is 120750505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505057021 - 2⁵ = 505056989 is a prime.

It is a super-2 number, since 2×505057021² = 510165188922788882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505057061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24051 + ... + 39856.

It is an arithmetic number, because the mean of its divisors is an integer number (72216040).

Almost surely, 2^505057021 is an apocalyptic number.

It is an amenable number.

505057021 is a deficient number, since it is larger than the sum of its proper divisors (72671299).

505057021 is a wasteful number, since it uses less digits than its factorization.

505057021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65043.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 505057021 is about 22473.4737190315. The cubic root of 505057021 is about 796.3673952993.

The spelling of 505057021 in words is "five hundred five million, fifty-seven thousand, twenty-one".