5198522781 has 4 divisors (see below), whose sum is σ = 6931363712. Its totient is φ = 3465681852.

The previous prime is 5198522741. The next prime is 5198522783. The reversal of 5198522781 is 1872258915.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5198522781 - 2¹⁵ = 5198490013 is a prime.

It is a super-2 number, since 2×5198522781² = 54049278209151947922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5198522781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5198522783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866420461 + ... + 866420466.

It is an arithmetic number, because the mean of its divisors is an integer number (1732840928).

Almost surely, 2^5198522781 is an apocalyptic number.

It is an amenable number.

5198522781 is a deficient number, since it is larger than the sum of its proper divisors (1732840931).

5198522781 is a wasteful number, since it uses less digits than its factorization.

5198522781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732840930.

The product of its digits is 403200, while the sum is 48.

The square root of 5198522781 is about 72100.7821108759. The cubic root of 5198522781 is about 1732.3141406746.

The spelling of 5198522781 in words is "five billion, one hundred ninety-eight million, five hundred twenty-two thousand, seven hundred eighty-one".