51555055501 has 16 divisors (see below), whose sum is σ = 53093690496. Its totient is φ = 50043626496.

The previous prime is 51555055471. The next prime is 51555055561. The reversal of 51555055501 is 10555055515.

51555055501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51555055501 - 2¹⁵ = 51555022733 is a prime.

It is a super-2 number, since 2×51555055501² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555055561) 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, 1577341 + ... + 1609693.

It is an arithmetic number, because the mean of its divisors is an integer number (3318355656).

Almost surely, 2^51555055501 is an apocalyptic number.

It is an amenable number.

51555055501 is a deficient number, since it is larger than the sum of its proper divisors (1538634995).

51555055501 is a wasteful number, since it uses less digits than its factorization.

51555055501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32772.

The product of its (nonzero) digits is 78125, while the sum is 37.

The spelling of 51555055501 in words is "fifty-one billion, five hundred fifty-five million, fifty-five thousand, five hundred one".