243331425 has 48 divisors (see below), whose sum is σ = 459137280. Its totient is φ = 126256320.

The previous prime is 243331409. The next prime is 243331441. The reversal of 243331425 is 524133342.

It is an interprime number because it is at equal distance from previous prime (243331409) and next prime (243331441).

It is not a de Polignac number, because 243331425 - 2⁴ = 243331409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20104 + ... + 29846.

It is an arithmetic number, because the mean of its divisors is an integer number (9565360).

Almost surely, 2^243331425 is an apocalyptic number.

243331425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243331425 is a deficient number, since it is larger than the sum of its proper divisors (215805855).

243331425 is a wasteful number, since it uses less digits than its factorization.

243331425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9799 (or 9788 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 243331425 is about 15599.0841077289. The cubic root of 243331425 is about 624.3087183561.

Adding to 243331425 its reverse (524133342), we get a palindrome (767464767).

The spelling of 243331425 in words is "two hundred forty-three million, three hundred thirty-one thousand, four hundred twenty-five".