55194821 has 8 divisors (see below), whose sum is σ = 60372000. Its totient is φ = 50044240.

The previous prime is 55194809. The next prime is 55194827. The reversal of 55194821 is 12849155.

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

It is a cyclic number.

It is not a de Polignac number, because 55194821 - 2¹⁰ = 55193797 is a prime.

It is a super-3 number, since 3×55194821³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55194827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2171 + ... + 10728.

It is an arithmetic number, because the mean of its divisors is an integer number (7546500).

Almost surely, 2^55194821 is an apocalyptic number.

It is an amenable number.

55194821 is a deficient number, since it is larger than the sum of its proper divisors (5177179).

55194821 is a wasteful number, since it uses less digits than its factorization.

55194821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299.

The product of its digits is 14400, while the sum is 35.

The square root of 55194821 is about 7429.3217052434. The cubic root of 55194821 is about 380.7437442091.

The spelling of 55194821 in words is "fifty-five million, one hundred ninety-four thousand, eight hundred twenty-one".