55312533 has 12 divisors (see below), whose sum is σ = 79960608. Its totient is φ = 36845160.

The previous prime is 55312529. The next prime is 55312547. The reversal of 55312533 is 33521355.

It is not a de Polignac number, because 55312533 - 2² = 55312529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55312497 and 55312506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55312573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19048 + ... + 21758.

It is an arithmetic number, because the mean of its divisors is an integer number (6663384).

Almost surely, 2^55312533 is an apocalyptic number.

It is an amenable number.

55312533 is a deficient number, since it is larger than the sum of its proper divisors (24648075).

55312533 is a wasteful number, since it uses less digits than its factorization.

55312533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984 (or 4981 counting only the distinct ones).

The product of its digits is 6750, while the sum is 27.

The square root of 55312533 is about 7437.2396088872. The cubic root of 55312533 is about 381.0142181645.

Adding to 55312533 its reverse (33521355), we get a palindrome (88833888).

The spelling of 55312533 in words is "fifty-five million, three hundred twelve thousand, five hundred thirty-three".