243240501403 has 2 divisors, whose sum is σ = 243240501404. Its totient is φ = 243240501402.

The previous prime is 243240501391. The next prime is 243240501409. The reversal of 243240501403 is 304105042342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243240501403 is a prime.

It is not a weakly prime, because it can be changed into another prime (243240501409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121620250701 + 121620250702.

It is an arithmetic number, because the mean of its divisors is an integer number (121620250702).

Almost surely, 2^243240501403 is an apocalyptic number.

243240501403 is a deficient number, since it is larger than the sum of its proper divisors (1).

243240501403 is an equidigital number, since it uses as much as digits as its factorization.

243240501403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 243240501403 its reverse (304105042342), we get a palindrome (547345543745).

The spelling of 243240501403 in words is "two hundred forty-three billion, two hundred forty million, five hundred one thousand, four hundred three".