55144330521 has 8 divisors (see below), whose sum is σ = 84029456064. Its totient is φ = 31511046000.

The previous prime is 55144330517. The next prime is 55144330523. The reversal of 55144330521 is 12503344155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55144330521 - 2² = 55144330517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55144330523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1312960230 + ... + 1312960271.

It is an arithmetic number, because the mean of its divisors is an integer number (10503682008).

Almost surely, 2^55144330521 is an apocalyptic number.

It is an amenable number.

55144330521 is a deficient number, since it is larger than the sum of its proper divisors (28885125543).

55144330521 is a wasteful number, since it uses less digits than its factorization.

55144330521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625920511.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 55144330521 its reverse (12503344155), we get a palindrome (67647674676).

The spelling of 55144330521 in words is "fifty-five billion, one hundred forty-four million, three hundred thirty thousand, five hundred twenty-one".