201154234243 has 4 divisors (see below), whose sum is σ = 201197996560. Its totient is φ = 201110471928.

The previous prime is 201154234241. The next prime is 201154234261. The reversal of 201154234243 is 342432451102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201154234243 - 2¹ = 201154234241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201154234241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21874263 + ... + 21883456.

It is an arithmetic number, because the mean of its divisors is an integer number (50299499140).

Almost surely, 2^201154234243 is an apocalyptic number.

201154234243 is a deficient number, since it is larger than the sum of its proper divisors (43762317).

201154234243 is an equidigital number, since it uses as much as digits as its factorization.

201154234243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43762316.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 201154234243 its reverse (342432451102), we get a palindrome (543586685345).

The spelling of 201154234243 in words is "two hundred one billion, one hundred fifty-four million, two hundred thirty-four thousand, two hundred forty-three".