5188032781 has 4 divisors (see below), whose sum is σ = 5275965600. Its totient is φ = 5100099964.

The previous prime is 5188032739. The next prime is 5188032791. The reversal of 5188032781 is 1872308815.

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 a cyclic number.

It is not a de Polignac number, because 5188032781 - 2⁷ = 5188032653 is a prime.

It is a super-2 number, since 2×5188032781² = 53831368273461187922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5188032701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43966321 + ... + 43966438.

It is an arithmetic number, because the mean of its divisors is an integer number (1318991400).

Almost surely, 2^5188032781 is an apocalyptic number.

It is an amenable number.

5188032781 is a deficient number, since it is larger than the sum of its proper divisors (87932819).

5188032781 is an equidigital number, since it uses as much as digits as its factorization.

5188032781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87932818.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 5188032781 is about 72027.9999791748. Note that the first 4 decimals coincide. The cubic root of 5188032781 is about 1731.1481548242.

The spelling of 5188032781 in words is "five billion, one hundred eighty-eight million, thirty-two thousand, seven hundred eighty-one".