50516981 has 2 divisors, whose sum is σ = 50516982. Its totient is φ = 50516980.

The previous prime is 50516933. The next prime is 50517001. The reversal of 50516981 is 18961505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40844881 + 9672100 = 6391^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 50516981 - 2¹⁸ = 50254837 is a prime.

It is a super-2 number, since 2×50516981² = 5103930738708722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50510981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25258490 + 25258491.

It is an arithmetic number, because the mean of its divisors is an integer number (25258491).

Almost surely, 2^50516981 is an apocalyptic number.

It is an amenable number.

50516981 is a deficient number, since it is larger than the sum of its proper divisors (1).

50516981 is an equidigital number, since it uses as much as digits as its factorization.

50516981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 50516981 is about 7107.5298803452. The cubic root of 50516981 is about 369.6685148941.

The spelling of 50516981 in words is "fifty million, five hundred sixteen thousand, nine hundred eighty-one".