55544431 has 8 divisors (see below), whose sum is σ = 56350784. Its totient is φ = 54743040.

The previous prime is 55544413. The next prime is 55544473. The reversal of 55544431 is 13444555.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55544431 - 2¹⁷ = 55413359 is a prime.

It is a super-2 number, since 2×55544431² = 6170367630227522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55544393 and 55544402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55544231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25231 + ... + 27343.

It is an arithmetic number, because the mean of its divisors is an integer number (7043848).

Almost surely, 2^55544431 is an apocalyptic number.

55544431 is a deficient number, since it is larger than the sum of its proper divisors (806353).

55544431 is a wasteful number, since it uses less digits than its factorization.

55544431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481.

The product of its digits is 24000, while the sum is 31.

The square root of 55544431 is about 7452.8136297643. The cubic root of 55544431 is about 381.5459436099.

Adding to 55544431 its reverse (13444555), we get a palindrome (68988986).

The spelling of 55544431 in words is "fifty-five million, five hundred forty-four thousand, four hundred thirty-one".