55043431 has 4 divisors (see below), whose sum is σ = 55413000. Its totient is φ = 54673864.

The previous prime is 55043423. The next prime is 55043447. The reversal of 55043431 is 13434055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13434055 = 5 ⋅2686811.

It is a cyclic number.

It is not a de Polignac number, because 55043431 - 2³ = 55043423 is a prime.

It is a super-2 number, since 2×55043431² = 6059558592503522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55043396 and 55043405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55043491) 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, 184561 + ... + 184858.

It is an arithmetic number, because the mean of its divisors is an integer number (13853250).

Almost surely, 2^55043431 is an apocalyptic number.

55043431 is a deficient number, since it is larger than the sum of its proper divisors (369569).

55043431 is a wasteful number, since it uses less digits than its factorization.

55043431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369568.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 55043431 is about 7419.1260266961. The cubic root of 55043431 is about 380.3953203626.

Adding to 55043431 its reverse (13434055), we get a palindrome (68477486).

The spelling of 55043431 in words is "fifty-five million, forty-three thousand, four hundred thirty-one".