51722939 has 2 divisors, whose sum is σ = 51722940. Its totient is φ = 51722938.

The previous prime is 51722917. The next prime is 51722953. The reversal of 51722939 is 93922715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51722939 - 2⁸ = 51722683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51722969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25861469 + 25861470.

It is an arithmetic number, because the mean of its divisors is an integer number (25861470).

Almost surely, 2^51722939 is an apocalyptic number.

51722939 is a deficient number, since it is larger than the sum of its proper divisors (1).

51722939 is an equidigital number, since it uses as much as digits as its factorization.

51722939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 51722939 is about 7191.8661695001. The cubic root of 51722939 is about 372.5870288975.

The spelling of 51722939 in words is "fifty-one million, seven hundred twenty-two thousand, nine hundred thirty-nine".