201434434523 has 12 divisors (see below), whose sum is σ = 234960188832. Its totient is φ = 172187613360.

The previous prime is 201434434483. The next prime is 201434434541. The reversal of 201434434523 is 325434434102.

It is not a de Polignac number, because 201434434523 - 2⁶ = 201434434459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201434434583) 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, 5582708 + ... + 5618673.

It is an arithmetic number, because the mean of its divisors is an integer number (19580015736).

Almost surely, 2^201434434523 is an apocalyptic number.

201434434523 is a deficient number, since it is larger than the sum of its proper divisors (33525754309).

201434434523 is a wasteful number, since it uses less digits than its factorization.

201434434523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11201762 (or 11201755 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 201434434523 its reverse (325434434102), we get a palindrome (526868868625).

The spelling of 201434434523 in words is "two hundred one billion, four hundred thirty-four million, four hundred thirty-four thousand, five hundred twenty-three".