201345523 has 2 divisors, whose sum is σ = 201345524. Its totient is φ = 201345522.

The previous prime is 201345457. The next prime is 201345539. The reversal of 201345523 is 325543102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201345523 - 2¹⁷ = 201214451 is a prime.

It is not a weakly prime, because it can be changed into another prime (201345923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100672761 + 100672762.

It is an arithmetic number, because the mean of its divisors is an integer number (100672762).

Almost surely, 2^201345523 is an apocalyptic number.

201345523 is a deficient number, since it is larger than the sum of its proper divisors (1).

201345523 is an equidigital number, since it uses as much as digits as its factorization.

201345523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 201345523 is about 14189.6273030690. The cubic root of 201345523 is about 586.1120619943.

Adding to 201345523 its reverse (325543102), we get a palindrome (526888625).

The spelling of 201345523 in words is "two hundred one million, three hundred forty-five thousand, five hundred twenty-three".