51100020329 has 2 divisors, whose sum is σ = 51100020330. Its totient is φ = 51100020328.

The previous prime is 51100020289. The next prime is 51100020341. The reversal of 51100020329 is 92302000115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32462309929 + 18637710400 = 180173^2 + 136520^2 .

It is a cyclic number.

It is not a de Polignac number, because 51100020329 - 2¹⁶ = 51099954793 is a prime.

It is a super-2 number, since 2×51100020329² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51100020359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550010164 + 25550010165.

It is an arithmetic number, because the mean of its divisors is an integer number (25550010165).

Almost surely, 2^51100020329 is an apocalyptic number.

It is an amenable number.

51100020329 is a deficient number, since it is larger than the sum of its proper divisors (1).

51100020329 is an equidigital number, since it uses as much as digits as its factorization.

51100020329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The spelling of 51100020329 in words is "fifty-one billion, one hundred million, twenty thousand, three hundred twenty-nine".