50311661 has 2 divisors, whose sum is σ = 50311662. Its totient is φ = 50311660.

The previous prime is 50311643. The next prime is 50311693. The reversal of 50311661 is 16611305.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50055625 + 256036 = 7075^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 50311661 - 2¹⁴ = 50295277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50311621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25155830 + 25155831.

It is an arithmetic number, because the mean of its divisors is an integer number (25155831).

Almost surely, 2^50311661 is an apocalyptic number.

It is an amenable number.

50311661 is a deficient number, since it is larger than the sum of its proper divisors (1).

50311661 is an equidigital number, since it uses as much as digits as its factorization.

50311661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 50311661 is about 7093.0713375801. The cubic root of 50311661 is about 369.1670109116.

Adding to 50311661 its reverse (16611305), we get a palindrome (66922966).

The spelling of 50311661 in words is "fifty million, three hundred eleven thousand, six hundred sixty-one".