55430403 has 16 divisors (see below), whose sum is σ = 86749440. Its totient is φ = 30818016.

The previous prime is 55430399. The next prime is 55430407. The reversal of 55430403 is 30403455.

It is a happy number.

55430403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55430399) and next prime (55430407).

It is not a de Polignac number, because 55430403 - 2² = 55430399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55430407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34893 + ... + 36446.

It is an arithmetic number, because the mean of its divisors is an integer number (5421840).

Almost surely, 2^55430403 is an apocalyptic number.

55430403 is a deficient number, since it is larger than the sum of its proper divisors (31319037).

55430403 is a wasteful number, since it uses less digits than its factorization.

55430403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71386.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 55430403 is about 7445.1597027868. The cubic root of 55430403 is about 381.2846709310.

Adding to 55430403 its reverse (30403455), we get a palindrome (85833858).

The spelling of 55430403 in words is "fifty-five million, four hundred thirty thousand, four hundred three".