243631245 has 48 divisors (see below), whose sum is σ = 460527552. Its totient is φ = 109025280.

The previous prime is 243631231. The next prime is 243631247. The reversal of 243631245 is 542136342.

It is not a de Polignac number, because 243631245 - 2¹⁵ = 243598477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243631247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23517 + ... + 32253.

It is an arithmetic number, because the mean of its divisors is an integer number (9594324).

Almost surely, 2^243631245 is an apocalyptic number.

It is an amenable number.

243631245 is a deficient number, since it is larger than the sum of its proper divisors (216896307).

243631245 is a wasteful number, since it uses less digits than its factorization.

243631245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8782 (or 8769 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 243631245 is about 15608.6913288719. The cubic root of 243631245 is about 624.5650264137.

Adding to 243631245 its reverse (542136342), we get a palindrome (785767587).

The spelling of 243631245 in words is "two hundred forty-three million, six hundred thirty-one thousand, two hundred forty-five".