55021322331 has 16 divisors (see below), whose sum is σ = 81968457600. Its totient is φ = 36475957224.

The previous prime is 55021322309. The next prime is 55021322339. The reversal of 55021322331 is 13322312055.

It is a happy number.

55021322331 is a `hidden beast` number, since 5 + 5 + 0 + 2 + 1 + 322 + 331 = 666.

55021322331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55021322331 - 2⁵ = 55021322299 is a prime.

It is a super-2 number, since 2×55021322331² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 55021322295 and 55021322304.

It is not an unprimeable number, because it can be changed into a prime (55021322339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5687421 + ... + 5697086.

It is an arithmetic number, because the mean of its divisors is an integer number (5123028600).

Almost surely, 2^55021322331 is an apocalyptic number.

55021322331 is a deficient number, since it is larger than the sum of its proper divisors (26947135269).

55021322331 is a wasteful number, since it uses less digits than its factorization.

55021322331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11384695 (or 11384689 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 55021322331 its reverse (13322312055), we get a palindrome (68343634386).

The spelling of 55021322331 in words is "fifty-five billion, twenty-one million, three hundred twenty-two thousand, three hundred thirty-one".