55315533 has 16 divisors (see below), whose sum is σ = 90774656. Its totient is φ = 29177280.

The previous prime is 55315523. The next prime is 55315543. The reversal of 55315533 is 33551355.

It is an interprime number because it is at equal distance from previous prime (55315523) and next prime (55315543).

It is a de Polignac number, because none of the positive numbers 2^k-55315533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55315533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55315523) 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 15 ways as a sum of consecutive naturals, for example, 101038 + ... + 101583.

It is an arithmetic number, because the mean of its divisors is an integer number (5673416).

Almost surely, 2^55315533 is an apocalyptic number.

It is an amenable number.

55315533 is a deficient number, since it is larger than the sum of its proper divisors (35459123).

55315533 is a wasteful number, since it uses less digits than its factorization.

55315533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202644.

The product of its digits is 16875, while the sum is 30.

The square root of 55315533 is about 7437.4412938860. The cubic root of 55315533 is about 381.0211064285.

Adding to 55315533 its reverse (33551355), we get a palindrome (88866888).

The spelling of 55315533 in words is "fifty-five million, three hundred fifteen thousand, five hundred thirty-three".