55431423 has 12 divisors (see below), whose sum is σ = 80138448. Its totient is φ = 36921600.

The previous prime is 55431421. The next prime is 55431443. The reversal of 55431423 is 32413455.

It is not a de Polignac number, because 55431423 - 2¹ = 55431421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55431421) 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 11 ways as a sum of consecutive naturals, for example, 12486 + ... + 16332.

It is an arithmetic number, because the mean of its divisors is an integer number (6678204).

Almost surely, 2^55431423 is an apocalyptic number.

55431423 is a deficient number, since it is larger than the sum of its proper divisors (24707025).

55431423 is a wasteful number, since it uses less digits than its factorization.

55431423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454 (or 5451 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 55431423 is about 7445.2282033528. The cubic root of 55431423 is about 381.2870096474.

Adding to 55431423 its reverse (32413455), we get a palindrome (87844878).

The spelling of 55431423 in words is "fifty-five million, four hundred thirty-one thousand, four hundred twenty-three".