55223661 has 8 divisors (see below), whose sum is σ = 73679904. Its totient is φ = 36791600.

The previous prime is 55223659. The next prime is 55223687. The reversal of 55223661 is 16632255.

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 55223661 - 2¹ = 55223659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55223561) 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, 211 + ... + 10511.

It is an arithmetic number, because the mean of its divisors is an integer number (9209988).

Almost surely, 2^55223661 is an apocalyptic number.

It is an amenable number.

55223661 is a deficient number, since it is larger than the sum of its proper divisors (18456243).

55223661 is a wasteful number, since it uses less digits than its factorization.

55223661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12091.

The product of its digits is 10800, while the sum is 30.

The square root of 55223661 is about 7431.2624095775. The cubic root of 55223661 is about 380.8100471546.

The spelling of 55223661 in words is "fifty-five million, two hundred twenty-three thousand, six hundred sixty-one".