243012200425 has 6 divisors (see below), whose sum is σ = 301335128558. Its totient is φ = 194409760320.

The previous prime is 243012200419. The next prime is 243012200513. The reversal of 243012200425 is 524002210342.

It can be written as a sum of positive squares in 3 ways, for example, as 64471303744 + 178540896681 = 253912^2 + 422541^2 .

It is a de Polignac number, because none of the positive numbers 2^k-243012200425 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 9720488017 = 243012200425 / (2 + 4 + 3 + 0 + 1 + 2 + 2 + 0 + 0 + 4 + 2 + 5).

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 243012200425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4860243984 + ... + 4860244033.

Almost surely, 2^243012200425 is an apocalyptic number.

243012200425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243012200425 is a deficient number, since it is larger than the sum of its proper divisors (58322928133).

243012200425 is an equidigital number, since it uses as much as digits as its factorization.

243012200425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720488027 (or 9720488022 counting only the distinct ones).

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

Adding to 243012200425 its reverse (524002210342), we get a palindrome (767014410767).

The spelling of 243012200425 in words is "two hundred forty-three billion, twelve million, two hundred thousand, four hundred twenty-five".