51490577 has 2 divisors, whose sum is σ = 51490578. Its totient is φ = 51490576.

The previous prime is 51490531. The next prime is 51490591. The reversal of 51490577 is 77509415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49505296 + 1985281 = 7036^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 51490577 - 2⁸ = 51490321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51490577.

It is not a weakly prime, because it can be changed into another prime (51490177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25745288 + 25745289.

It is an arithmetic number, because the mean of its divisors is an integer number (25745289).

Almost surely, 2^51490577 is an apocalyptic number.

It is an amenable number.

51490577 is a deficient number, since it is larger than the sum of its proper divisors (1).

51490577 is an equidigital number, since it uses as much as digits as its factorization.

51490577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 51490577 is about 7175.6934856500. The cubic root of 51490577 is about 372.0282501574.

The spelling of 51490577 in words is "fifty-one million, four hundred ninety thousand, five hundred seventy-seven".