201244507465 has 16 divisors (see below), whose sum is σ = 243765522000. Its totient is φ = 159481550592.

The previous prime is 201244507463. The next prime is 201244507547. The reversal of 201244507465 is 564705442102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 113784889 + 201130722576 = 10667^2 + 448476^2 .

It is a cyclic number.

It is not a de Polignac number, because 201244507465 - 2¹ = 201244507463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201244507463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2438619 + ... + 2519791.

It is an arithmetic number, because the mean of its divisors is an integer number (15235345125).

Almost surely, 2^201244507465 is an apocalyptic number.

It is an amenable number.

201244507465 is a deficient number, since it is larger than the sum of its proper divisors (42521014535).

201244507465 is a wasteful number, since it uses less digits than its factorization.

201244507465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85836.

The product of its (nonzero) digits is 268800, while the sum is 40.

Adding to 201244507465 its reverse (564705442102), we get a palindrome (765949949567).

The spelling of 201244507465 in words is "two hundred one billion, two hundred forty-four million, five hundred seven thousand, four hundred sixty-five".