51503566054 has 4 divisors (see below), whose sum is σ = 77255349084. Its totient is φ = 25751783026.

The previous prime is 51503566013. The next prime is 51503566091. The reversal of 51503566054 is 45066530515.

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

It is a super-2 number, since 2×51503566054² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51503565998 and 51503566016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12875891512 + ... + 12875891515.

It is an arithmetic number, because the mean of its divisors is an integer number (19313837271).

Almost surely, 2^51503566054 is an apocalyptic number.

51503566054 is a deficient number, since it is larger than the sum of its proper divisors (25751783030).

51503566054 is a wasteful number, since it uses less digits than its factorization.

51503566054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25751783029.

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 51503566054 in words is "fifty-one billion, five hundred three million, five hundred sixty-six thousand, fifty-four".