251275141 has 4 divisors (see below), whose sum is σ = 270604012. Its totient is φ = 231946272.

The previous prime is 251275139. The next prime is 251275151. The reversal of 251275141 is 141572152.

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 160149025 + 91126116 = 12655^2 + 9546^2 .

It is a cyclic number.

It is not a de Polignac number, because 251275141 - 2¹ = 251275139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251275151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9664416 + ... + 9664441.

It is an arithmetic number, because the mean of its divisors is an integer number (67651003).

Almost surely, 2^251275141 is an apocalyptic number.

It is an amenable number.

251275141 is a deficient number, since it is larger than the sum of its proper divisors (19328871).

251275141 is a wasteful number, since it uses less digits than its factorization.

251275141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19328870.

The product of its digits is 2800, while the sum is 28.

The square root of 251275141 is about 15851.6605123880. The cubic root of 251275141 is about 631.0297604264.

The spelling of 251275141 in words is "two hundred fifty-one million, two hundred seventy-five thousand, one hundred forty-one".