51442209017 has 2 divisors, whose sum is σ = 51442209018. Its totient is φ = 51442209016.

The previous prime is 51442208959. The next prime is 51442209023. The reversal of 51442209017 is 71090224415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43339328761 + 8102880256 = 208181^2 + 90016^2 .

It is a cyclic number.

It is not a de Polignac number, because 51442209017 - 2⁸ = 51442208761 is a prime.

It is a super-2 number, since 2×51442209017² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51442809017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25721104508 + 25721104509.

It is an arithmetic number, because the mean of its divisors is an integer number (25721104509).

Almost surely, 2^51442209017 is an apocalyptic number.

It is an amenable number.

51442209017 is a deficient number, since it is larger than the sum of its proper divisors (1).

51442209017 is an equidigital number, since it uses as much as digits as its factorization.

51442209017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 51442209017 in words is "fifty-one billion, four hundred forty-two million, two hundred nine thousand, seventeen".