512440243 has 4 divisors (see below), whose sum is σ = 585646000. Its totient is φ = 439234488.

The previous prime is 512440223. The next prime is 512440249. The reversal of 512440243 is 342044215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342044215 = 5 ⋅68408843.

It is not a de Polignac number, because 512440243 - 2⁵ = 512440211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512440249) 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, 36602868 + ... + 36602881.

It is an arithmetic number, because the mean of its divisors is an integer number (146411500).

Almost surely, 2^512440243 is an apocalyptic number.

512440243 is a deficient number, since it is larger than the sum of its proper divisors (73205757).

512440243 is an equidigital number, since it uses as much as digits as its factorization.

512440243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73205756.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 512440243 is about 22637.1429955284. The cubic root of 512440243 is about 800.2292275413.

Adding to 512440243 its reverse (342044215), we get a palindrome (854484458).

The spelling of 512440243 in words is "five hundred twelve million, four hundred forty thousand, two hundred forty-three".