5201981 has 2 divisors, whose sum is σ = 5201982. Its totient is φ = 5201980.

The previous prime is 5201969. The next prime is 5201993. The reversal of 5201981 is 1891025.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (5201969) and next prime (5201993).

It can be written as a sum of positive squares in only one way, i.e., 4553956 + 648025 = 2134^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 5201981 - 2¹⁰ = 5200957 is a prime.

It is a super-2 number, since 2×5201981² = 54121212648722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5201981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5201951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600990 + 2600991.

It is an arithmetic number, because the mean of its divisors is an integer number (2600991).

Almost surely, 2^5201981 is an apocalyptic number.

It is an amenable number.

5201981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5201981 is an equidigital number, since it uses as much as digits as its factorization.

5201981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 5201981 is about 2280.7851718213. The cubic root of 5201981 is about 173.2698185272.

The spelling of 5201981 in words is "five million, two hundred one thousand, nine hundred eighty-one".