55243836 has 48 divisors (see below), whose sum is σ = 144228000. Its totient is φ = 18285696.

The previous prime is 55243801. The next prime is 55243841. The reversal of 55243836 is 63834255.

It is a happy number.

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 55243836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14376 + ... + 17808.

It is an arithmetic number, because the mean of its divisors is an integer number (3004750).

Almost surely, 2^55243836 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 55243836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72114000).

55243836 is an abundant number, since it is smaller than the sum of its proper divisors (88984164).

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

55243836 is a wasteful number, since it uses less digits than its factorization.

55243836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595 (or 3587 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 55243836 is about 7432.6197265836. The cubic root of 55243836 is about 380.8564156082.

The spelling of 55243836 in words is "fifty-five million, two hundred forty-three thousand, eight hundred thirty-six".