55431233 has 8 divisors (see below), whose sum is σ = 65122176. Its totient is φ = 46515600.

The previous prime is 55431223. The next prime is 55431241. The reversal of 55431233 is 33213455.

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 55431233 - 2¹⁸ = 55169089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55431223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193673 + ... + 193958.

It is an arithmetic number, because the mean of its divisors is an integer number (8140272).

Almost surely, 2^55431233 is an apocalyptic number.

It is an amenable number.

55431233 is a deficient number, since it is larger than the sum of its proper divisors (9690943).

55431233 is a wasteful number, since it uses less digits than its factorization.

55431233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387655.

The product of its digits is 5400, while the sum is 26.

The square root of 55431233 is about 7445.2154434912. The cubic root of 55431233 is about 381.2865740063.

Adding to 55431233 its reverse (33213455), we get a palindrome (88644688).

It can be divided in two parts, 5543 and 1233, that added together give a palindrome (6776).

The spelling of 55431233 in words is "fifty-five million, four hundred thirty-one thousand, two hundred thirty-three".