51121073 has 2 divisors, whose sum is σ = 51121074. Its totient is φ = 51121072.

The previous prime is 51121061. The next prime is 51121117. The reversal of 51121073 is 37012115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47499664 + 3621409 = 6892^2 + 1903^2 .

It is a cyclic number.

It is not a de Polignac number, because 51121073 - 2⁶ = 51121009 is a prime.

It is a super-2 number, since 2×51121073² = 5226728209342658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51121033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25560536 + 25560537.

It is an arithmetic number, because the mean of its divisors is an integer number (25560537).

Almost surely, 2^51121073 is an apocalyptic number.

It is an amenable number.

51121073 is a deficient number, since it is larger than the sum of its proper divisors (1).

51121073 is an equidigital number, since it uses as much as digits as its factorization.

51121073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 51121073 is about 7149.9002090938. The cubic root of 51121073 is about 371.1362029965.

Adding to 51121073 its reverse (37012115), we get a palindrome (88133188).

The spelling of 51121073 in words is "fifty-one million, one hundred twenty-one thousand, seventy-three".