55101321 has 12 divisors (see below), whose sum is σ = 86826480. Its totient is φ = 33394680.

The previous prime is 55101317. The next prime is 55101323. The reversal of 55101321 is 12310155.

It is not a de Polignac number, because 55101321 - 2² = 55101317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55101294 and 55101303.

It is not an unprimeable number, because it can be changed into a prime (55101323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278191 + ... + 278388.

It is an arithmetic number, because the mean of its divisors is an integer number (7235540).

Almost surely, 2^55101321 is an apocalyptic number.

It is an amenable number.

55101321 is a deficient number, since it is larger than the sum of its proper divisors (31725159).

55101321 is a wasteful number, since it uses less digits than its factorization.

55101321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556596 (or 556593 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 55101321 is about 7423.0264043717. The cubic root of 55101321 is about 380.5286294559.

Adding to 55101321 its reverse (12310155), we get a palindrome (67411476).

The spelling of 55101321 in words is "fifty-five million, one hundred one thousand, three hundred twenty-one".