51407761 has 2 divisors, whose sum is σ = 51407762. Its totient is φ = 51407760.

The previous prime is 51407753. The next prime is 51407767. The reversal of 51407761 is 16770415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32433025 + 18974736 = 5695^2 + 4356^2 .

It is a cyclic number.

It is not a de Polignac number, because 51407761 - 2³ = 51407753 is a prime.

It is not a weakly prime, because it can be changed into another prime (51407767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25703880 + 25703881.

It is an arithmetic number, because the mean of its divisors is an integer number (25703881).

Almost surely, 2^51407761 is an apocalyptic number.

It is an amenable number.

51407761 is a deficient number, since it is larger than the sum of its proper divisors (1).

51407761 is an equidigital number, since it uses as much as digits as its factorization.

51407761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 51407761 is about 7169.9205713871. The cubic root of 51407761 is about 371.8286898620.

The spelling of 51407761 in words is "fifty-one million, four hundred seven thousand, seven hundred sixty-one".