55578373 has 4 divisors (see below), whose sum is σ = 57994848. Its totient is φ = 53161900.

The previous prime is 55578361. The next prime is 55578407. The reversal of 55578373 is 37387555.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37387555 = 5 ⋅7477511.

It is a cyclic number.

It is not a de Polignac number, because 55578373 - 2⁹ = 55577861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55578323) 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, 1208203 + ... + 1208248.

It is an arithmetic number, because the mean of its divisors is an integer number (14498712).

Almost surely, 2^55578373 is an apocalyptic number.

It is an amenable number.

55578373 is a deficient number, since it is larger than the sum of its proper divisors (2416475).

55578373 is a wasteful number, since it uses less digits than its factorization.

55578373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416474.

The product of its digits is 441000, while the sum is 43.

The square root of 55578373 is about 7455.0904085732. The cubic root of 55578373 is about 381.6236459416.

The spelling of 55578373 in words is "fifty-five million, five hundred seventy-eight thousand, three hundred seventy-three".