51511046523 has 16 divisors (see below), whose sum is σ = 68887852800. Its totient is φ = 34237625184.

The previous prime is 51511046519. The next prime is 51511046533. The reversal of 51511046523 is 32564011515.

It is not a de Polignac number, because 51511046523 - 2² = 51511046519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51511046533) 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, 1347528 + ... + 1385226.

It is an arithmetic number, because the mean of its divisors is an integer number (4305490800).

Almost surely, 2^51511046523 is an apocalyptic number.

51511046523 is a deficient number, since it is larger than the sum of its proper divisors (17376806277).

51511046523 is a wasteful number, since it uses less digits than its factorization.

51511046523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39058.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 51511046523 in words is "fifty-one billion, five hundred eleven million, forty-six thousand, five hundred twenty-three".