50561657 has 2 divisors, whose sum is σ = 50561658. Its totient is φ = 50561656.

The previous prime is 50561653. The next prime is 50561663. The reversal of 50561657 is 75616505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31933801 + 18627856 = 5651^2 + 4316^2 .

It is a cyclic number.

It is not a de Polignac number, because 50561657 - 2² = 50561653 is a prime.

It is not a weakly prime, because it can be changed into another prime (50561653) 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, 25280828 + 25280829.

It is an arithmetic number, because the mean of its divisors is an integer number (25280829).

Almost surely, 2^50561657 is an apocalyptic number.

It is an amenable number.

50561657 is a deficient number, since it is larger than the sum of its proper divisors (1).

50561657 is an equidigital number, since it uses as much as digits as its factorization.

50561657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 50561657 is about 7110.6720498136. The cubic root of 50561657 is about 369.7774580920. Note that the first 3 decimals are identical.

The spelling of 50561657 in words is "fifty million, five hundred sixty-one thousand, six hundred fifty-seven".