55322021 has 8 divisors (see below), whose sum is σ = 56244864. Its totient is φ = 54406800.

The previous prime is 55322009. The next prime is 55322027. The reversal of 55322021 is 12022355.

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 55322021 - 2¹⁰ = 55320997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55321984 and 55322002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55322027) 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, 13775 + ... + 17331.

It is an arithmetic number, because the mean of its divisors is an integer number (7030608).

Almost surely, 2^55322021 is an apocalyptic number.

It is an amenable number.

55322021 is a deficient number, since it is larger than the sum of its proper divisors (922843).

55322021 is a wasteful number, since it uses less digits than its factorization.

55322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 55322021 is about 7437.8774526070. The cubic root of 55322021 is about 381.0360025958.

Adding to 55322021 its reverse (12022355), we get a palindrome (67344376).

The spelling of 55322021 in words is "fifty-five million, three hundred twenty-two thousand, twenty-one".