5201581181 has 4 divisors (see below), whose sum is σ = 5222304864. Its totient is φ = 5180857500.

The previous prime is 5201581157. The next prime is 5201581207. The reversal of 5201581181 is 1811851025.

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 5201581181 - 2⁶ = 5201581117 is a prime.

It is a super-2 number, since 2×5201581181² = 54112893565066709522, 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 (5201581111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10361465 + ... + 10361966.

It is an arithmetic number, because the mean of its divisors is an integer number (1305576216).

Almost surely, 2^5201581181 is an apocalyptic number.

It is an amenable number.

5201581181 is a deficient number, since it is larger than the sum of its proper divisors (20723683).

5201581181 is a wasteful number, since it uses less digits than its factorization.

5201581181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20723682.

The product of its (nonzero) digits is 3200, while the sum is 32.

The square root of 5201581181 is about 72121.9881936154. The cubic root of 5201581181 is about 1732.6537929908.

The spelling of 5201581181 in words is "five billion, two hundred one million, five hundred eighty-one thousand, one hundred eighty-one".