505671621 has 48 divisors (see below), whose sum is σ = 852876864. Its totient is φ = 264128256.

The previous prime is 505671619. The next prime is 505671667. The reversal of 505671621 is 126176505.

It is not a de Polignac number, because 505671621 - 2¹ = 505671619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505671611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203241 + ... + 205713.

It is an arithmetic number, because the mean of its divisors is an integer number (17768268).

Almost surely, 2^505671621 is an apocalyptic number.

It is an amenable number.

505671621 is a deficient number, since it is larger than the sum of its proper divisors (347205243).

505671621 is a wasteful number, since it uses less digits than its factorization.

505671621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610 (or 2603 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 505671621 is about 22487.1434602085. The cubic root of 505671621 is about 796.6902954736.

The spelling of 505671621 in words is "five hundred five million, six hundred seventy-one thousand, six hundred twenty-one".