243240501401 has 8 divisors (see below), whose sum is σ = 243739955784. Its totient is φ = 242741422080.

The previous prime is 243240501391. The next prime is 243240501403. The reversal of 243240501401 is 104105042342.

It can be written as a sum of positive squares in 4 ways, for example, as 21206349376 + 222034152025 = 145624^2 + 471205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243240501401 - 2¹⁴ = 243240485017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243240501403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223555 + ... + 1408391.

It is an arithmetic number, because the mean of its divisors is an integer number (30467494473).

Almost surely, 2^243240501401 is an apocalyptic number.

It is an amenable number.

243240501401 is a deficient number, since it is larger than the sum of its proper divisors (499454383).

243240501401 is a wasteful number, since it uses less digits than its factorization.

243240501401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187531.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 243240501401 its reverse (104105042342), we get a palindrome (347345543743).

The spelling of 243240501401 in words is "two hundred forty-three billion, two hundred forty million, five hundred one thousand, four hundred one".