55130024221 has 4 divisors (see below), whose sum is σ = 55138111072. Its totient is φ = 55121937372.

The previous prime is 55130024219. The next prime is 55130024231. The reversal of 55130024221 is 12242003155.

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 55130024221 - 2¹ = 55130024219 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 (55130024231) 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, 4033191 + ... + 4046836.

It is an arithmetic number, because the mean of its divisors is an integer number (13784527768).

Almost surely, 2^55130024221 is an apocalyptic number.

It is an amenable number.

55130024221 is a deficient number, since it is larger than the sum of its proper divisors (8086851).

55130024221 is an equidigital number, since it uses as much as digits as its factorization.

55130024221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086850.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 55130024221 its reverse (12242003155), we get a palindrome (67372027376).

The spelling of 55130024221 in words is "fifty-five billion, one hundred thirty million, twenty-four thousand, two hundred twenty-one".