55516321331 has 8 divisors (see below), whose sum is σ = 58588467600. Its totient is φ = 52459198560.

The previous prime is 55516321321. The next prime is 55516321339. The reversal of 55516321331 is 13312361555.

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

It is a cyclic number.

It is not a de Polignac number, because 55516321331 - 2¹⁸ = 55516059187 is a prime.

It is a super-2 number, since 2×55516321331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55516321291 and 55516321300.

It is not an unprimeable number, because it can be changed into a prime (55516321339) 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, 3748280 + ... + 3763061.

It is an arithmetic number, because the mean of its divisors is an integer number (7323558450).

Almost surely, 2^55516321331 is an apocalyptic number.

55516321331 is a deficient number, since it is larger than the sum of its proper divisors (3072146269).

55516321331 is a wasteful number, since it uses less digits than its factorization.

55516321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7511749.

The product of its digits is 40500, while the sum is 35.

Adding to 55516321331 its reverse (13312361555), we get a palindrome (68828682886).

The spelling of 55516321331 in words is "fifty-five billion, five hundred sixteen million, three hundred twenty-one thousand, three hundred thirty-one".