55320529 has 4 divisors (see below), whose sum is σ = 60349680. Its totient is φ = 50291380.

The previous prime is 55320481. The next prime is 55320541. The reversal of 55320529 is 92502355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55320529 - 2⁹ = 55320017 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55320529.

It is not an unprimeable number, because it can be changed into a prime (55320569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514559 + ... + 2514580.

It is an arithmetic number, because the mean of its divisors is an integer number (15087420).

Almost surely, 2^55320529 is an apocalyptic number.

It is an amenable number.

55320529 is a deficient number, since it is larger than the sum of its proper divisors (5029151).

55320529 is a wasteful number, since it uses less digits than its factorization.

55320529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029150.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 55320529 is about 7437.7771544999. Note that the first 3 decimals coincide. The cubic root of 55320529 is about 381.0325771314.

The spelling of 55320529 in words is "fifty-five million, three hundred twenty thousand, five hundred twenty-nine".