512221993 has 4 divisors (see below), whose sum is σ = 513328768. Its totient is φ = 511115220.

The previous prime is 512221973. The next prime is 512222047. The reversal of 512221993 is 399122215.

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 not a de Polignac number, because 512221993 - 2⁵ = 512221961 is a prime.

It is a super-2 number, since 2×512221993² = 524742740225784098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512221943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552693 + ... + 553618.

It is an arithmetic number, because the mean of its divisors is an integer number (128332192).

Almost surely, 2^512221993 is an apocalyptic number.

It is an amenable number.

512221993 is a deficient number, since it is larger than the sum of its proper divisors (1106775).

512221993 is a wasteful number, since it uses less digits than its factorization.

512221993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106774.

The product of its digits is 9720, while the sum is 34.

The square root of 512221993 is about 22632.3218649789. The cubic root of 512221993 is about 800.1156046478.

The spelling of 512221993 in words is "five hundred twelve million, two hundred twenty-one thousand, nine hundred ninety-three".