51725749 has 2 divisors, whose sum is σ = 51725750. Its totient is φ = 51725748.

The previous prime is 51725711. The next prime is 51725753. The reversal of 51725749 is 94752715.

51725749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40233649 + 11492100 = 6343^2 + 3390^2 .

It is a cyclic number.

It is not a de Polignac number, because 51725749 - 2²¹ = 49628597 is a prime.

It is a super-2 number, since 2×51725749² = 5351106219222002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51725759) 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, 25862874 + 25862875.

It is an arithmetic number, because the mean of its divisors is an integer number (25862875).

Almost surely, 2^51725749 is an apocalyptic number.

It is an amenable number.

51725749 is a deficient number, since it is larger than the sum of its proper divisors (1).

51725749 is an equidigital number, since it uses as much as digits as its factorization.

51725749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 40.

The square root of 51725749 is about 7192.0615264332. The cubic root of 51725749 is about 372.5937760688.

The spelling of 51725749 in words is "fifty-one million, seven hundred twenty-five thousand, seven hundred forty-nine".