55243476 has 72 divisors (see below), whose sum is σ = 144528384. Its totient is φ = 17781120.

The previous prime is 55243459. The next prime is 55243477. The reversal of 55243476 is 67434255.

55243476 is a `hidden beast` number, since 552 + 4 + 34 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55243476.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196456 + ... + 196736.

Almost surely, 2^55243476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55243476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72264192).

55243476 is an abundant number, since it is smaller than the sum of its proper divisors (89284908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55243476 is a wasteful number, since it uses less digits than its factorization.

55243476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 456 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 55243476 is about 7432.5955089726. The cubic root of 55243476 is about 380.8555883147.

The spelling of 55243476 in words is "fifty-five million, two hundred forty-three thousand, four hundred seventy-six".