5500307581 has 4 divisors (see below), whose sum is σ = 5582401792. Its totient is φ = 5418213372.

The previous prime is 5500307537. The next prime is 5500307599. The reversal of 5500307581 is 1857030055.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1857030055 = 5 ⋅371406011.

It is a cyclic number.

It is not a de Polignac number, because 5500307581 - 2⁷ = 5500307453 is a prime.

It is a super-2 number, since 2×5500307581² = 60506766971212143122, 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 (5500307531) 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, 41047005 + ... + 41047138.

It is an arithmetic number, because the mean of its divisors is an integer number (1395600448).

Almost surely, 2^5500307581 is an apocalyptic number.

It is an amenable number.

5500307581 is a deficient number, since it is larger than the sum of its proper divisors (82094211).

5500307581 is an equidigital number, since it uses as much as digits as its factorization.

5500307581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82094210.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 5500307581 is about 74164.0585526439. The cubic root of 5500307581 is about 1765.2070721427.

The spelling of 5500307581 in words is "five billion, five hundred million, three hundred seven thousand, five hundred eighty-one".