55021011 has 8 divisors (see below), whose sum is σ = 73427904. Its totient is φ = 36647400.

The previous prime is 55021009. The next prime is 55021039. The reversal of 55021011 is 11012055.

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

It is not a de Polignac number, because 55021011 - 2¹ = 55021009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55021111) 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, 4165 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (9178488).

Almost surely, 2^55021011 is an apocalyptic number.

55021011 is a deficient number, since it is larger than the sum of its proper divisors (18406893).

55021011 is a wasteful number, since it uses less digits than its factorization.

55021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16641.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 55021011 is about 7417.6149131645. The cubic root of 55021011 is about 380.3436664770.

Adding to 55021011 its reverse (11012055), we get a palindrome (66033066).

The spelling of 55021011 in words is "fifty-five million, twenty-one thousand, eleven".