243447425 has 12 divisors (see below), whose sum is σ = 325096380. Its totient is φ = 179776320.

The previous prime is 243447419. The next prime is 243447461. The reversal of 243447425 is 524744342.

It can be written as a sum of positive squares in 6 ways, for example, as 4343056 + 239104369 = 2084^2 + 15463^2 .

It is not a de Polignac number, because 243447425 - 2⁴ = 243447409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 374210 + ... + 374859.

It is an arithmetic number, because the mean of its divisors is an integer number (27091365).

Almost surely, 2^243447425 is an apocalyptic number.

243447425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243447425 is a deficient number, since it is larger than the sum of its proper divisors (81648955).

243447425 is a wasteful number, since it uses less digits than its factorization.

243447425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749092 (or 749087 counting only the distinct ones).

The product of its digits is 107520, while the sum is 35.

The square root of 243447425 is about 15602.8018317224. The cubic root of 243447425 is about 624.4079085949.

The spelling of 243447425 in words is "two hundred forty-three million, four hundred forty-seven thousand, four hundred twenty-five".