512243957 has 4 divisors (see below), whose sum is σ = 513144780. Its totient is φ = 511343136.

The previous prime is 512243951. The next prime is 512243981. The reversal of 512243957 is 759342215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89283601 + 422960356 = 9449^2 + 20566^2 .

It is a cyclic number.

It is not a de Polignac number, because 512243957 - 2²² = 508049653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 512243957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512243951) 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, 449558 + ... + 450695.

It is an arithmetic number, because the mean of its divisors is an integer number (128286195).

Almost surely, 2^512243957 is an apocalyptic number.

It is an amenable number.

512243957 is a deficient number, since it is larger than the sum of its proper divisors (900823).

512243957 is an equidigital number, since it uses as much as digits as its factorization.

512243957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900822.

The product of its digits is 75600, while the sum is 38.

The square root of 512243957 is about 22632.8070950114. The cubic root of 512243957 is about 800.1270407622.

The spelling of 512243957 in words is "five hundred twelve million, two hundred forty-three thousand, nine hundred fifty-seven".