501162281 has 2 divisors, whose sum is σ = 501162282. Its totient is φ = 501162280.

The previous prime is 501162257. The next prime is 501162307. The reversal of 501162281 is 182261105.

It is an a-pointer prime, because the next prime (501162307) can be obtained adding 501162281 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342805225 + 158357056 = 18515^2 + 12584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501162281 is a prime.

It is a super-2 number, since 2×501162281² = 502327263794245922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 501162281.

It is not a weakly prime, because it can be changed into another prime (501162241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250581140 + 250581141.

It is an arithmetic number, because the mean of its divisors is an integer number (250581141).

Almost surely, 2^501162281 is an apocalyptic number.

It is an amenable number.

501162281 is a deficient number, since it is larger than the sum of its proper divisors (1).

501162281 is an equidigital number, since it uses as much as digits as its factorization.

501162281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 501162281 is about 22386.6540822875. The cubic root of 501162281 is about 794.3150520891.

The spelling of 501162281 in words is "five hundred one million, one hundred sixty-two thousand, two hundred eighty-one".