55216641 has 8 divisors (see below), whose sum is σ = 77497120. Its totient is φ = 34873632.

The previous prime is 55216633. The next prime is 55216649. The reversal of 55216641 is 14661255.

It is an interprime number because it is at equal distance from previous prime (55216633) and next prime (55216649).

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

It is not a de Polignac number, because 55216641 - 2³ = 55216633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55216599 and 55216608.

It is not an unprimeable number, because it can be changed into a prime (55216649) 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, 484300 + ... + 484413.

It is an arithmetic number, because the mean of its divisors is an integer number (9687140).

Almost surely, 2^55216641 is an apocalyptic number.

It is an amenable number.

55216641 is a deficient number, since it is larger than the sum of its proper divisors (22280479).

55216641 is a wasteful number, since it uses less digits than its factorization.

55216641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968735.

The product of its digits is 7200, while the sum is 30.

The square root of 55216641 is about 7430.7900656660. The cubic root of 55216641 is about 380.7939103528.

Adding to 55216641 its reverse (14661255), we get a palindrome (69877896).

The spelling of 55216641 in words is "fifty-five million, two hundred sixteen thousand, six hundred forty-one".