5555243228581 has 4 divisors (see below), whose sum is σ = 5625562763200. Its totient is φ = 5484923693964.

The previous prime is 5555243228543. The next prime is 5555243228609. The reversal of 5555243228581 is 1858223425555.

It is a happy number.

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 5555243228581 - 2⁷ = 5555243228453 is a prime.

It is a super-2 number, since 2×5555243228581² (a number of 26 digits) 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 (5555243228081) 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, 35159767191 + ... + 35159767348.

It is an arithmetic number, because the mean of its divisors is an integer number (1406390690800).

Almost surely, 2^{5555243228581} is an apocalyptic number.

It is an amenable number.

5555243228581 is a deficient number, since it is larger than the sum of its proper divisors (70319534619).

5555243228581 is an equidigital number, since it uses as much as digits as its factorization.

5555243228581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70319534618.

The product of its digits is 19200000, while the sum is 55.

The spelling of 5555243228581 in words is "five trillion, five hundred fifty-five billion, two hundred forty-three million, two hundred twenty-eight thousand, five hundred eighty-one".