243317257425 has 72 divisors (see below), whose sum is σ = 491311852640. Its totient is φ = 117971964000.

The previous prime is 243317257411. The next prime is 243317257429. The reversal of 243317257425 is 524752713342.

243317257425 is a `hidden beast` number, since 2 + 4 + 3 + 3 + 1 + 72 + 574 + 2 + 5 = 666.

It is not a de Polignac number, because 243317257425 - 2⁶ = 243317257361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (243317257429) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1407871 + ... + 1571220.

Almost surely, 2^243317257425 is an apocalyptic number.

243317257425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243317257425 is an abundant number, since it is smaller than the sum of its proper divisors (247994595215).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243317257425 is a wasteful number, since it uses less digits than its factorization.

243317257425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979132 (or 2979110 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 45.

The spelling of 243317257425 in words is "two hundred forty-three billion, three hundred seventeen million, two hundred fifty-seven thousand, four hundred twenty-five".