51145123550 has 48 divisors (see below), whose sum is σ = 98564182560. Its totient is φ = 19721708160.

The previous prime is 51145123537. The next prime is 51145123567. The reversal of 51145123550 is 5532154115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 910892 + ... + 965408.

It is an arithmetic number, because the mean of its divisors is an integer number (2053420470).

Almost surely, 2^51145123550 is an apocalyptic number.

51145123550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51145123550 is a deficient number, since it is larger than the sum of its proper divisors (47419059010).

51145123550 is a wasteful number, since it uses less digits than its factorization.

51145123550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55205 (or 55200 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 51145123550 its reverse (5532154115), we get a palindrome (56677277665).

The spelling of 51145123550 in words is "fifty-one billion, one hundred forty-five million, one hundred twenty-three thousand, five hundred fifty".