55390315 has 4 divisors (see below), whose sum is σ = 66468384. Its totient is φ = 44312248.

The previous prime is 55390277. The next prime is 55390327. The reversal of 55390315 is 51309355.

55390315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55390315 - 2¹⁹ = 54866027 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539027 + ... + 5539036.

It is an arithmetic number, because the mean of its divisors is an integer number (16617096).

Almost surely, 2^55390315 is an apocalyptic number.

55390315 is a deficient number, since it is larger than the sum of its proper divisors (11078069).

55390315 is a wasteful number, since it uses less digits than its factorization.

55390315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078068.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 55390315 is about 7442.4669969036. The cubic root of 55390315 is about 381.1927320593.

The spelling of 55390315 in words is "fifty-five million, three hundred ninety thousand, three hundred fifteen".