55212543 has 8 divisors (see below), whose sum is σ = 81796400. Its totient is φ = 36808344.

The previous prime is 55212541. The next prime is 55212551. The reversal of 55212543 is 34521255.

It is a happy number.

It is not a de Polignac number, because 55212543 - 2¹ = 55212541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2044909 = 55212543 / (5 + 5 + 2 + 1 + 2 + 5 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55212541) 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, 1022428 + ... + 1022481.

It is an arithmetic number, because the mean of its divisors is an integer number (10224550).

Almost surely, 2^55212543 is an apocalyptic number.

55212543 is a deficient number, since it is larger than the sum of its proper divisors (26583857).

55212543 is a wasteful number, since it uses less digits than its factorization.

55212543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044918 (or 2044912 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 55212543 is about 7430.5143159811. The cubic root of 55212543 is about 380.7844896901.

Adding to 55212543 its reverse (34521255), we get a palindrome (89733798).

It can be divided in two parts, 55212 and 543, that added together give a palindrome (55755).

The spelling of 55212543 in words is "fifty-five million, two hundred twelve thousand, five hundred forty-three".