51722977 has 2 divisors, whose sum is σ = 51722978. Its totient is φ = 51722976.

The previous prime is 51722969. The next prime is 51723029. The reversal of 51722977 is 77922715.

It is a happy number.

51722977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43877376 + 7845601 = 6624^2 + 2801^2 .

It is a cyclic number.

It is not a de Polignac number, because 51722977 - 2³ = 51722969 is a prime.

It is not a weakly prime, because it can be changed into another prime (51722917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25861488 + 25861489.

It is an arithmetic number, because the mean of its divisors is an integer number (25861489).

Almost surely, 2^51722977 is an apocalyptic number.

It is an amenable number.

51722977 is a deficient number, since it is larger than the sum of its proper divisors (1).

51722977 is an equidigital number, since it uses as much as digits as its factorization.

51722977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 40.

The square root of 51722977 is about 7191.8688113730. The cubic root of 51722977 is about 372.5871201420.

The spelling of 51722977 in words is "fifty-one million, seven hundred twenty-two thousand, nine hundred seventy-seven".