251144252145 has 12 divisors (see below), whose sum is σ = 435316703796. Its totient is φ = 133943601120.

The previous prime is 251144252141. The next prime is 251144252171. The reversal of 251144252145 is 541252441152.

251144252145 is a `hidden beast` number, since 2 + 5 + 1 + 14 + 425 + 214 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51541712784 + 199602539361 = 227028^2 + 446769^2 .

It is not a de Polignac number, because 251144252145 - 2² = 251144252141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251144252141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2790491646 + ... + 2790491735.

It is an arithmetic number, because the mean of its divisors is an integer number (36276391983).

Almost surely, 2^251144252145 is an apocalyptic number.

It is an amenable number.

251144252145 is a deficient number, since it is larger than the sum of its proper divisors (184172451651).

251144252145 is a wasteful number, since it uses less digits than its factorization.

251144252145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580983392 (or 5580983389 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

Adding to 251144252145 its reverse (541252441152), we get a palindrome (792396693297).

The spelling of 251144252145 in words is "two hundred fifty-one billion, one hundred forty-four million, two hundred fifty-two thousand, one hundred forty-five".