5311498781 has 2 divisors, whose sum is σ = 5311498782. Its totient is φ = 5311498780.

The previous prime is 5311498693. The next prime is 5311498817. The reversal of 5311498781 is 1878941135.

Together with next prime (5311498817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5286598681 + 24900100 = 72709^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 5311498781 - 2¹⁰ = 5311497757 is a prime.

It is a super-2 number, since 2×5311498781² = 56424038601128971922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5311498081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2655749390 + 2655749391.

It is an arithmetic number, because the mean of its divisors is an integer number (2655749391).

Almost surely, 2^5311498781 is an apocalyptic number.

It is an amenable number.

5311498781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5311498781 is an equidigital number, since it uses as much as digits as its factorization.

5311498781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 47.

The square root of 5311498781 is about 72880.0300562507. The cubic root of 5311498781 is about 1744.7733885250.

The spelling of 5311498781 in words is "five billion, three hundred eleven million, four hundred ninety-eight thousand, seven hundred eighty-one".