251523541055 has 16 divisors (see below), whose sum is σ = 319600694304. Its totient is φ = 189371857920.

The previous prime is 251523541039. The next prime is 251523541117. The reversal of 251523541055 is 550145325152.

It is not a de Polignac number, because 251523541055 - 2⁴ = 251523541039 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 15 ways as a sum of consecutive naturals, for example, 1665104 + ... + 1809866.

It is an arithmetic number, because the mean of its divisors is an integer number (19975043394).

Almost surely, 2^251523541055 is an apocalyptic number.

251523541055 is a deficient number, since it is larger than the sum of its proper divisors (68077153249).

251523541055 is a wasteful number, since it uses less digits than its factorization.

251523541055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165226.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 251523541055 in words is "two hundred fifty-one billion, five hundred twenty-three million, five hundred forty-one thousand, fifty-five".