5261144981 has 2 divisors, whose sum is σ = 5261144982. Its totient is φ = 5261144980.

The previous prime is 5261144963. The next prime is 5261145031. The reversal of 5261144981 is 1894411625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3527172100 + 1733972881 = 59390^2 + 41641^2 .

It is a cyclic number.

It is not a de Polignac number, because 5261144981 - 2²⁶ = 5194036117 is a prime.

It is a super-2 number, since 2×5261144981² = 55359293022202980722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5261144081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630572490 + 2630572491.

It is an arithmetic number, because the mean of its divisors is an integer number (2630572491).

Almost surely, 2^5261144981 is an apocalyptic number.

It is an amenable number.

5261144981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5261144981 is an equidigital number, since it uses as much as digits as its factorization.

5261144981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 5261144981 is about 72533.7506337567. The cubic root of 5261144981 is about 1739.2423024402.

The spelling of 5261144981 in words is "five billion, two hundred sixty-one million, one hundred forty-four thousand, nine hundred eighty-one".