55241021 has 8 divisors (see below), whose sum is σ = 60321888. Its totient is φ = 50170000.

The previous prime is 55240979. The next prime is 55241029. The reversal of 55241021 is 12014255.

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 55241021 - 2⁶ = 55240957 is a prime.

It is a super-2 number, since 2×55241021² = 6103140802244882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55240984 and 55241002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55241029) 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, 14231 + ... + 17691.

It is an arithmetic number, because the mean of its divisors is an integer number (7540236).

Almost surely, 2^55241021 is an apocalyptic number.

It is an amenable number.

55241021 is a deficient number, since it is larger than the sum of its proper divisors (5080867).

55241021 is a wasteful number, since it uses less digits than its factorization.

55241021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 55241021 is about 7432.4303562159. The cubic root of 55241021 is about 380.8499465365.

Adding to 55241021 its reverse (12014255), we get a palindrome (67255276).

The spelling of 55241021 in words is "fifty-five million, two hundred forty-one thousand, twenty-one".