251125145251 has 16 divisors (see below), whose sum is σ = 258848894304. Its totient is φ = 243493576704.

The previous prime is 251125145237. The next prime is 251125145281. The reversal of 251125145251 is 152541521152.

It is a cyclic number.

It is not a de Polignac number, because 251125145251 - 2¹³ = 251125137059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251125145221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3199165 + ... + 3276721.

It is an arithmetic number, because the mean of its divisors is an integer number (16178055894).

Almost surely, 2^251125145251 is an apocalyptic number.

251125145251 is a deficient number, since it is larger than the sum of its proper divisors (7723749053).

251125145251 is a wasteful number, since it uses less digits than its factorization.

251125145251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78150.

The product of its digits is 20000, while the sum is 34.

The spelling of 251125145251 in words is "two hundred fifty-one billion, one hundred twenty-five million, one hundred forty-five thousand, two hundred fifty-one".