252111002445 has 16 divisors (see below), whose sum is σ = 448197337920. Its totient is φ = 134459201232.

The previous prime is 252111002443. The next prime is 252111002453. The reversal of 252111002445 is 544200111252.

It is a happy number.

252111002445 is a `hidden beast` number, since 2 + 5 + 211 + 1 + 0 + 0 + 2 + 445 = 666.

It is not a de Polignac number, because 252111002445 - 2¹ = 252111002443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252111002443) 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, 933744319 + ... + 933744588.

It is an arithmetic number, because the mean of its divisors is an integer number (28012333620).

Almost surely, 2^252111002445 is an apocalyptic number.

It is an amenable number.

252111002445 is a deficient number, since it is larger than the sum of its proper divisors (196086335475).

252111002445 is a wasteful number, since it uses less digits than its factorization.

252111002445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867488921 (or 1867488915 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 252111002445 its reverse (544200111252), we get a palindrome (796311113697).

The spelling of 252111002445 in words is "two hundred fifty-two billion, one hundred eleven million, two thousand, four hundred forty-five".