51100020305 has 8 divisors (see below), whose sum is σ = 61373214312. Its totient is φ = 40844556288.

The previous prime is 51100020289. The next prime is 51100020329. The reversal of 51100020305 is 50302000115.

It can be written as a sum of positive squares in 4 ways, for example, as 17849227201 + 33250793104 = 133601^2 + 182348^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51100020305 - 2⁴ = 51100020289 is a prime.

It is a super-2 number, since 2×51100020305² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4426154 + ... + 4437683.

It is an arithmetic number, because the mean of its divisors is an integer number (7671651789).

Almost surely, 2^51100020305 is an apocalyptic number.

It is an amenable number.

51100020305 is a deficient number, since it is larger than the sum of its proper divisors (10273194007).

51100020305 is a wasteful number, since it uses less digits than its factorization.

51100020305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864995.

The product of its (nonzero) digits is 150, while the sum is 17.

The spelling of 51100020305 in words is "fifty-one billion, one hundred million, twenty thousand, three hundred five".