55540243 has 8 divisors (see below), whose sum is σ = 60643440. Its totient is φ = 50446080.

The previous prime is 55540231. The next prime is 55540259. The reversal of 55540243 is 34204555.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55540243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55540223) 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, 21771 + ... + 24187.

It is an arithmetic number, because the mean of its divisors is an integer number (7580430).

Almost surely, 2^55540243 is an apocalyptic number.

55540243 is a deficient number, since it is larger than the sum of its proper divisors (5103197).

55540243 is a wasteful number, since it uses less digits than its factorization.

55540243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55540243 is about 7452.5326567550. The cubic root of 55540243 is about 381.5363539622.

Adding to 55540243 its reverse (34204555), we get a palindrome (89744798).

The spelling of 55540243 in words is "fifty-five million, five hundred forty thousand, two hundred forty-three".