243201022523 has 12 divisors (see below), whose sum is σ = 267834544848. Its totient is φ = 220383527760.

The previous prime is 243201022501. The next prime is 243201022541. The reversal of 243201022523 is 325220102342.

It is not a de Polignac number, because 243201022523 - 2¹⁰ = 243201021499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243201022492 and 243201022501.

It is not an unprimeable number, because it can be changed into a prime (243201022583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14637068 + ... + 14653673.

It is an arithmetic number, because the mean of its divisors is an integer number (22319545404).

Almost surely, 2^243201022523 is an apocalyptic number.

243201022523 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

243201022523 is a deficient number, since it is larger than the sum of its proper divisors (24633522325).

243201022523 is a wasteful number, since it uses less digits than its factorization.

243201022523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29290802 (or 29290783 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 243201022523 its reverse (325220102342), we get a palindrome (568421124865).

The spelling of 243201022523 in words is "two hundred forty-three billion, two hundred one million, twenty-two thousand, five hundred twenty-three".