51030020553505 has 16 divisors (see below), whose sum is σ = 71611563729024. Its totient is φ = 34178246323200.

The previous prime is 51030020553427. The next prime is 51030020553509. The reversal of 51030020553505 is 50535502003015.

It is not a de Polignac number, because 51030020553505 - 2⁹ = 51030020552993 is a prime.

It is a super-2 number, since 2×51030020553505² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51030020553509) 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, 16953493696 + ... + 16953496705.

It is an arithmetic number, because the mean of its divisors is an integer number (4475722733064).

Almost surely, 2^{51030020553505} is an apocalyptic number.

It is an amenable number.

51030020553505 is a deficient number, since it is larger than the sum of its proper divisors (20581543175519).

51030020553505 is a wasteful number, since it uses less digits than its factorization.

51030020553505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33906990456.

The product of its (nonzero) digits is 56250, while the sum is 34.

The spelling of 51030020553505 in words is "fifty-one trillion, thirty billion, twenty million, five hundred fifty-three thousand, five hundred five".