55031533 has 8 divisors (see below), whose sum is σ = 58337280. Its totient is φ = 51733440.

The previous prime is 55031527. The next prime is 55031551. The reversal of 55031533 is 33513055.

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 55031533 - 2²¹ = 52934381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55031498 and 55031507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55031503) 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 7 ways as a sum of consecutive naturals, for example, 20478 + ... + 23008.

It is an arithmetic number, because the mean of its divisors is an integer number (7292160).

Almost surely, 2^55031533 is an apocalyptic number.

It is an amenable number.

55031533 is a deficient number, since it is larger than the sum of its proper divisors (3305747).

55031533 is a wasteful number, since it uses less digits than its factorization.

55031533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3827.

The product of its (nonzero) digits is 3375, while the sum is 25.

The square root of 55031533 is about 7418.3241368924. The cubic root of 55031533 is about 380.3679100699.

Adding to 55031533 its reverse (33513055), we get a palindrome (88544588).

The spelling of 55031533 in words is "fifty-five million, thirty-one thousand, five hundred thirty-three".