55243533 has 4 divisors (see below), whose sum is σ = 73658048. Its totient is φ = 36829020.

The previous prime is 55243511. The next prime is 55243541. The reversal of 55243533 is 33534255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55243533 - 2⁹ = 55243021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55243533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9207253 + ... + 9207258.

It is an arithmetic number, because the mean of its divisors is an integer number (18414512).

Almost surely, 2^55243533 is an apocalyptic number.

It is an amenable number.

55243533 is a deficient number, since it is larger than the sum of its proper divisors (18414515).

55243533 is a wasteful number, since it uses less digits than its factorization.

55243533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18414514.

The product of its digits is 27000, while the sum is 30.

The square root of 55243533 is about 7432.5993434330. The cubic root of 55243533 is about 380.8557193031.

Adding to 55243533 its reverse (33534255), we get a palindrome (88777788).

The spelling of 55243533 in words is "fifty-five million, two hundred forty-three thousand, five hundred thirty-three".