55320293 has 4 divisors (see below), whose sum is σ = 63223200. Its totient is φ = 47417388.

The previous prime is 55320281. The next prime is 55320299. The reversal of 55320293 is 39202355.

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 55320293 - 2⁴ = 55320277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55320299) 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, 3951443 + ... + 3951456.

It is an arithmetic number, because the mean of its divisors is an integer number (15805800).

Almost surely, 2^55320293 is an apocalyptic number.

It is an amenable number.

55320293 is a deficient number, since it is larger than the sum of its proper divisors (7902907).

55320293 is an equidigital number, since it uses as much as digits as its factorization.

55320293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902906.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 55320293 is about 7437.7612895279. The cubic root of 55320293 is about 381.0320352963.

The spelling of 55320293 in words is "fifty-five million, three hundred twenty thousand, two hundred ninety-three".