55243661 has 8 divisors (see below), whose sum is σ = 60328800. Its totient is φ = 50169040.

The previous prime is 55243651. The next prime is 55243681. The reversal of 55243661 is 16634255.

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 55243661 - 2⁶ = 55243597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243651) 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, 11855 + ... + 15843.

It is an arithmetic number, because the mean of its divisors is an integer number (7541100).

Almost surely, 2^55243661 is an apocalyptic number.

It is an amenable number.

55243661 is a deficient number, since it is larger than the sum of its proper divisors (5085139).

55243661 is a wasteful number, since it uses less digits than its factorization.

55243661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5259.

The product of its digits is 21600, while the sum is 32.

The square root of 55243661 is about 7432.6079541437. The cubic root of 55243661 is about 380.8560134521.

The spelling of 55243661 in words is "fifty-five million, two hundred forty-three thousand, six hundred sixty-one".