251412505445 has 4 divisors (see below), whose sum is σ = 301695006540. Its totient is φ = 201130004352.

The previous prime is 251412505441. The next prime is 251412505459. The reversal of 251412505445 is 544505214152.

251412505445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71285262049 + 180127243396 = 266993^2 + 424414^2 .

It is a cyclic number.

It is not a de Polignac number, because 251412505445 - 2² = 251412505441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251412505399 and 251412505408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251412505441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25141250540 + ... + 25141250549.

It is an arithmetic number, because the mean of its divisors is an integer number (75423751635).

Almost surely, 2^251412505445 is an apocalyptic number.

It is an amenable number.

251412505445 is a deficient number, since it is larger than the sum of its proper divisors (50282501095).

251412505445 is an equidigital number, since it uses as much as digits as its factorization.

251412505445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50282501094.

The product of its (nonzero) digits is 160000, while the sum is 38.

Adding to 251412505445 its reverse (544505214152), we get a palindrome (795917719597).

The spelling of 251412505445 in words is "two hundred fifty-one billion, four hundred twelve million, five hundred five thousand, four hundred forty-five".