55404161 has 8 divisors (see below), whose sum is σ = 58587648. Its totient is φ = 52308000.

The previous prime is 55404137. The next prime is 55404179. The reversal of 55404161 is 16140455.

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 55404161 - 2¹⁴ = 55387777 is a prime.

It is a super-2 number, since 2×55404161² = 6139242112227842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55404161.

It is not an unprimeable number, because it can be changed into a prime (55404101) 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, 20525 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (7323456).

Almost surely, 2^55404161 is an apocalyptic number.

It is an amenable number.

55404161 is a deficient number, since it is larger than the sum of its proper divisors (3183487).

55404161 is a wasteful number, since it uses less digits than its factorization.

55404161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43663.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 55404161 is about 7443.3971410909. The cubic root of 55404161 is about 381.2244918525.

The spelling of 55404161 in words is "fifty-five million, four hundred four thousand, one hundred sixty-one".