251625055 has 8 divisors (see below), whose sum is σ = 329400144. Its totient is φ = 183000000.

The previous prime is 251625019. The next prime is 251625089. The reversal of 251625055 is 550526152.

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

It is not a de Polignac number, because 251625055 - 2¹⁵ = 251592287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2287446 + ... + 2287555.

It is an arithmetic number, because the mean of its divisors is an integer number (41175018).

Almost surely, 2^251625055 is an apocalyptic number.

251625055 is a deficient number, since it is larger than the sum of its proper divisors (77775089).

251625055 is a wasteful number, since it uses less digits than its factorization.

251625055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575017.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 251625055 is about 15862.6938128428. The cubic root of 251625055 is about 631.3225387346.

The spelling of 251625055 in words is "two hundred fifty-one million, six hundred twenty-five thousand, fifty-five".