51488761 has 2 divisors, whose sum is σ = 51488762. Its totient is φ = 51488760.

The previous prime is 51488753. The next prime is 51488771. The reversal of 51488761 is 16788415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27625536 + 23863225 = 5256^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 51488761 - 2³ = 51488753 is a prime.

It is not a weakly prime, because it can be changed into another prime (51488711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25744380 + 25744381.

It is an arithmetic number, because the mean of its divisors is an integer number (25744381).

Almost surely, 2^51488761 is an apocalyptic number.

It is an amenable number.

51488761 is a deficient number, since it is larger than the sum of its proper divisors (1).

51488761 is an equidigital number, since it uses as much as digits as its factorization.

51488761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 40.

The square root of 51488761 is about 7175.5669462419. The cubic root of 51488761 is about 372.0238764688.

The spelling of 51488761 in words is "fifty-one million, four hundred eighty-eight thousand, seven hundred sixty-one".