55430120 has 16 divisors (see below), whose sum is σ = 124717860. Its totient is φ = 22172032.

The previous prime is 55430101. The next prime is 55430129. The reversal of 55430120 is 2103455.

It can be written as a sum of positive squares in 2 ways, for example, as 55323844 + 106276 = 7438^2 + 326^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 55430092 and 55430101.

It is not an unprimeable number, because it can be changed into a prime (55430129) 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, 692837 + ... + 692916.

Almost surely, 2^55430120 is an apocalyptic number.

It is an amenable number.

55430120 is an abundant number, since it is smaller than the sum of its proper divisors (69287740).

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

55430120 is a wasteful number, since it uses less digits than its factorization.

55430120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385764 (or 1385760 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 55430120 is about 7445.1406971259. The cubic root of 55430120 is about 381.2840220467.

Adding to 55430120 its reverse (2103455), we get a palindrome (57533575).

The spelling of 55430120 in words is "fifty-five million, four hundred thirty thousand, one hundred twenty".