51506677 has 2 divisors, whose sum is σ = 51506678. Its totient is φ = 51506676.

The previous prime is 51506671. The next prime is 51506687. The reversal of 51506677 is 77660515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51466276 + 40401 = 7174^2 + 201^2 .

It is a cyclic number.

It is not a de Polignac number, because 51506677 - 2³ = 51506669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51506671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25753338 + 25753339.

It is an arithmetic number, because the mean of its divisors is an integer number (25753339).

Almost surely, 2^51506677 is an apocalyptic number.

It is an amenable number.

51506677 is a deficient number, since it is larger than the sum of its proper divisors (1).

51506677 is an equidigital number, since it uses as much as digits as its factorization.

51506677 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 37.

The square root of 51506677 is about 7176.8152407597. The cubic root of 51506677 is about 372.0670212038.

The spelling of 51506677 in words is "fifty-one million, five hundred six thousand, six hundred seventy-seven".