51555251056 has 20 divisors (see below), whose sum is σ = 100241269912. Its totient is φ = 25686536256.

The previous prime is 51555251047. The next prime is 51555251063. The reversal of 51555251056 is 65015255515.

It is a happy number.

It is a super-2 number, since 2×51555251056² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5688411 + ... + 5697466.

Almost surely, 2^51555251056 is an apocalyptic number.

It is an amenable number.

51555251056 is a deficient number, since it is larger than the sum of its proper divisors (48686018856).

51555251056 is a wasteful number, since it uses less digits than its factorization.

51555251056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11386168 (or 11386162 counting only the distinct ones).

The product of its (nonzero) digits is 187500, while the sum is 40.

The spelling of 51555251056 in words is "fifty-one billion, five hundred fifty-five million, two hundred fifty-one thousand, fifty-six".