55391894 has 8 divisors (see below), whose sum is σ = 83451360. Its totient is φ = 27574776.

The previous prime is 55391893. The next prime is 55391929. The reversal of 55391894 is 49819355.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55391891) 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, 60014 + ... + 60929.

It is an arithmetic number, because the mean of its divisors is an integer number (10431420).

Almost surely, 2^55391894 is an apocalyptic number.

55391894 is a deficient number, since it is larger than the sum of its proper divisors (28059466).

55391894 is a wasteful number, since it uses less digits than its factorization.

55391894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121174.

The product of its digits is 194400, while the sum is 44.

The square root of 55391894 is about 7442.5730765643. The cubic root of 55391894 is about 381.1963542184.

The spelling of 55391894 in words is "fifty-five million, three hundred ninety-one thousand, eight hundred ninety-four".