201242250645 has 16 divisors (see below), whose sum is σ = 322152854400. Its totient is φ = 107274115904.

The previous prime is 201242250623. The next prime is 201242250647. The reversal of 201242250645 is 546052242102.

It is a cyclic number.

It is not a de Polignac number, because 201242250645 - 2⁵ = 201242250613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201242250647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3412569 + ... + 3471038.

It is an arithmetic number, because the mean of its divisors is an integer number (20134553400).

Almost surely, 2^201242250645 is an apocalyptic number.

It is an amenable number.

201242250645 is a deficient number, since it is larger than the sum of its proper divisors (120910603755).

201242250645 is a wasteful number, since it uses less digits than its factorization.

201242250645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6885564.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 201242250645 its reverse (546052242102), we get a palindrome (747294492747).

The spelling of 201242250645 in words is "two hundred one billion, two hundred forty-two million, two hundred fifty thousand, six hundred forty-five".