243220453425 has 36 divisors (see below), whose sum is σ = 435717114924. Its totient is φ = 129693081600.

The previous prime is 243220453393. The next prime is 243220453451. The reversal of 243220453425 is 524354022342.

243220453425 is a `hidden beast` number, since 2 + 4 + 3 + 220 + 4 + 5 + 3 + 425 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6802785441 + 236417667984 = 82479^2 + 486228^2 .

It is not a de Polignac number, because 243220453425 - 2⁵ = 243220453393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243220453425.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1124889 + ... + 1323561.

Almost surely, 2^243220453425 is an apocalyptic number.

243220453425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243220453425 is a deficient number, since it is larger than the sum of its proper divisors (192496661499).

243220453425 is a wasteful number, since it uses less digits than its factorization.

243220453425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204130 (or 204122 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 36.

Adding to 243220453425 its reverse (524354022342), we get a palindrome (767574475767).

The spelling of 243220453425 in words is "two hundred forty-three billion, two hundred twenty million, four hundred fifty-three thousand, four hundred twenty-five".