51322897 has 2 divisors, whose sum is σ = 51322898. Its totient is φ = 51322896.

The previous prime is 51322889. The next prime is 51322907. The reversal of 51322897 is 79822315.

It is a Cunningham number, because it is equal to 7164²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51322896 + 1 = 7164^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 51322897 - 2³ = 51322889 is a prime.

It is not a weakly prime, because it can be changed into another prime (51322807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25661448 + 25661449.

It is an arithmetic number, because the mean of its divisors is an integer number (25661449).

Almost surely, 2^51322897 is an apocalyptic number.

It is an amenable number.

51322897 is a deficient number, since it is larger than the sum of its proper divisors (1).

51322897 is an equidigital number, since it uses as much as digits as its factorization.

51322897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 51322897 is about 7164.0000697934. Note that the first 4 decimals coincide. The cubic root of 51322897 is about 371.6239720732.

The spelling of 51322897 in words is "fifty-one million, three hundred twenty-two thousand, eight hundred ninety-seven".