5555652221 has 4 divisors (see below), whose sum is σ = 6349316832. Its totient is φ = 4761987612.

The previous prime is 5555652203. The next prime is 5555652247. The reversal of 5555652221 is 1222565555.

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: 1222565555 = 5 ⋅244513111.

It is a cyclic number.

It is not a de Polignac number, because 5555652221 - 2¹⁰ = 5555651197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555652821) 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, 396832295 + ... + 396832308.

It is an arithmetic number, because the mean of its divisors is an integer number (1587329208).

Almost surely, 2^5555652221 is an apocalyptic number.

It is an amenable number.

5555652221 is a deficient number, since it is larger than the sum of its proper divisors (793664611).

5555652221 is an equidigital number, since it uses as much as digits as its factorization.

5555652221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793664610.

The product of its digits is 150000, while the sum is 38.

The square root of 5555652221 is about 74536.2476986868. The cubic root of 5555652221 is about 1771.1078874811.

The spelling of 5555652221 in words is "five billion, five hundred fifty-five million, six hundred fifty-two thousand, two hundred twenty-one".