51049588251 has 16 divisors (see below), whose sum is σ = 69106744064. Its totient is φ = 33513109344.

The previous prime is 51049588217. The next prime is 51049588273. The reversal of 51049588251 is 15288594015.

It is not a de Polignac number, because 51049588251 - 2⁷ = 51049588123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51049588251.

It is not an unprimeable number, because it can be changed into a prime (51049580251) 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, 536301 + ... + 624273.

It is an arithmetic number, because the mean of its divisors is an integer number (4319171504).

Almost surely, 2^51049588251 is an apocalyptic number.

51049588251 is a deficient number, since it is larger than the sum of its proper divisors (18057155813).

51049588251 is a wasteful number, since it uses less digits than its factorization.

51049588251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90930.

The product of its (nonzero) digits is 576000, while the sum is 48.

The spelling of 51049588251 in words is "fifty-one billion, forty-nine million, five hundred eighty-eight thousand, two hundred fifty-one".