251148004487 has 4 divisors (see below), whose sum is σ = 251299027200. Its totient is φ = 250996981776.

The previous prime is 251148004469. The next prime is 251148004489. The reversal of 251148004487 is 784400841152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 251148004487 - 2³⁶ = 182428527751 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 (251148004489) 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, 75508862 + ... + 75512187.

It is an arithmetic number, because the mean of its divisors is an integer number (62824756800).

Almost surely, 2^251148004487 is an apocalyptic number.

251148004487 is a deficient number, since it is larger than the sum of its proper divisors (151022713).

251148004487 is a wasteful number, since it uses less digits than its factorization.

251148004487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151022712.

The product of its (nonzero) digits is 286720, while the sum is 44.

The spelling of 251148004487 in words is "two hundred fifty-one billion, one hundred forty-eight million, four thousand, four hundred eighty-seven".