251275145 has 8 divisors (see below), whose sum is σ = 328942080. Its totient is φ = 182745520.

The previous prime is 251275139. The next prime is 251275151. The reversal of 251275145 is 541572152.

It is an interprime number because it is at equal distance from previous prime (251275139) and next prime (251275151).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251275145 - 2²⁰ = 250226569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2284265 + ... + 2284374.

It is an arithmetic number, because the mean of its divisors is an integer number (41117760).

Almost surely, 2^251275145 is an apocalyptic number.

It is an amenable number.

251275145 is a deficient number, since it is larger than the sum of its proper divisors (77666935).

251275145 is a wasteful number, since it uses less digits than its factorization.

251275145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568655.

The product of its digits is 14000, while the sum is 32.

The square root of 251275145 is about 15851.6606385577. The cubic root of 251275145 is about 631.0297637748.

The spelling of 251275145 in words is "two hundred fifty-one million, two hundred seventy-five thousand, one hundred forty-five".