512222749 has 4 divisors (see below), whose sum is σ = 514519936. Its totient is φ = 509925564.

The previous prime is 512222743. The next prime is 512222761. The reversal of 512222749 is 947222215.

It is a happy number.

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 512222749 - 2³ = 512222741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512222741) 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, 1148259 + ... + 1148704.

It is an arithmetic number, because the mean of its divisors is an integer number (128629984).

Almost surely, 2^512222749 is an apocalyptic number.

It is an amenable number.

512222749 is a deficient number, since it is larger than the sum of its proper divisors (2297187).

512222749 is a wasteful number, since it uses less digits than its factorization.

512222749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297186.

The product of its digits is 20160, while the sum is 34.

The square root of 512222749 is about 22632.3385667500. The cubic root of 512222749 is about 800.1159982839.

The spelling of 512222749 in words is "five hundred twelve million, two hundred twenty-two thousand, seven hundred forty-nine".