53005278251 has 4 divisors (see below), whose sum is σ = 53046021504. Its totient is φ = 52964535000.

The previous prime is 53005278239. The next prime is 53005278269. The reversal of 53005278251 is 15287250035.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53005278251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53005278211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20369675 + ... + 20372276.

It is an arithmetic number, because the mean of its divisors is an integer number (13261505376).

Almost surely, 2^53005278251 is an apocalyptic number.

53005278251 is a deficient number, since it is larger than the sum of its proper divisors (40743253).

53005278251 is a wasteful number, since it uses less digits than its factorization.

53005278251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40743252.

The product of its (nonzero) digits is 84000, while the sum is 38.

The spelling of 53005278251 in words is "fifty-three billion, five million, two hundred seventy-eight thousand, two hundred fifty-one".