506671621 has 24 divisors (see below), whose sum is σ = 553130496. Its totient is φ = 463879680.

The previous prime is 506671619. The next prime is 506671631. The reversal of 506671621 is 126176605.

It is a happy number.

It is not a de Polignac number, because 506671621 - 2¹ = 506671619 is a prime.

It is a super-2 number, since 2×506671621² = 513432263053535282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506671631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2652636 + ... + 2652826.

It is an arithmetic number, because the mean of its divisors is an integer number (23047104).

Almost surely, 2^506671621 is an apocalyptic number.

It is an amenable number.

506671621 is a deficient number, since it is larger than the sum of its proper divisors (46458875).

506671621 is a wasteful number, since it uses less digits than its factorization.

506671621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 506671621 is about 22509.3674055936. The cubic root of 506671621 is about 797.2151194034.

The spelling of 506671621 in words is "five hundred six million, six hundred seventy-one thousand, six hundred twenty-one".