55405461 has 4 divisors (see below), whose sum is σ = 73873952. Its totient is φ = 36936972.

The previous prime is 55405453. The next prime is 55405517. The reversal of 55405461 is 16450455.

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.

It is not a de Polignac number, because 55405461 - 2³ = 55405453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55405561) 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, 9234241 + ... + 9234246.

It is an arithmetic number, because the mean of its divisors is an integer number (18468488).

Almost surely, 2^55405461 is an apocalyptic number.

It is an amenable number.

55405461 is a deficient number, since it is larger than the sum of its proper divisors (18468491).

55405461 is a wasteful number, since it uses less digits than its factorization.

55405461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18468490.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 55405461 is about 7443.4844662967. The cubic root of 55405461 is about 381.2274735055.

The spelling of 55405461 in words is "fifty-five million, four hundred five thousand, four hundred sixty-one".