55435220 has 48 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 21548160.

The previous prime is 55435207. The next prime is 55435229. The reversal of 55435220 is 2253455.

It is a self number, because there is not a number n which added to its sum of digits gives 55435220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55435229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128405 + ... + 128835.

It is an arithmetic number, because the mean of its divisors is an integer number (2494800).

Almost surely, 2^55435220 is an apocalyptic number.

It is an amenable number.

55435220 is an abundant number, since it is smaller than the sum of its proper divisors (64315180).

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

55435220 is a wasteful number, since it uses less digits than its factorization.

55435220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 55435220 is about 7445.4831945281. The cubic root of 55435220 is about 381.2957153817.

Adding to 55435220 its reverse (2253455), we get a palindrome (57688675).

It can be divided in two parts, 55435 and 220, that added together give a palindrome (55655).

The spelling of 55435220 in words is "fifty-five million, four hundred thirty-five thousand, two hundred twenty".