512648621 has 4 divisors (see below), whose sum is σ = 513427200. Its totient is φ = 511870044.

The previous prime is 512648611. The next prime is 512648627. The reversal of 512648621 is 126846215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512648621 is a prime.

It is a super-2 number, since 2×512648621² = 525617217226403282, 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 (512648627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388301 + ... + 389618.

It is an arithmetic number, because the mean of its divisors is an integer number (128356800).

Almost surely, 2^512648621 is an apocalyptic number.

It is an amenable number.

512648621 is a deficient number, since it is larger than the sum of its proper divisors (778579).

512648621 is an equidigital number, since it uses as much as digits as its factorization.

512648621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778578.

The product of its digits is 23040, while the sum is 35.

The square root of 512648621 is about 22641.7450961714. The cubic root of 512648621 is about 800.3376808820.

The spelling of 512648621 in words is "five hundred twelve million, six hundred forty-eight thousand, six hundred twenty-one".