55547419 has 4 divisors (see below), whose sum is σ = 55573344. Its totient is φ = 55521496.

The previous prime is 55547411. The next prime is 55547447. The reversal of 55547419 is 91474555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55547419 - 2³ = 55547411 is a prime.

It is a super-2 number, since 2×55547419² = 6171031515123122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55547411) 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, 9427 + ... + 14140.

It is an arithmetic number, because the mean of its divisors is an integer number (13893336).

Almost surely, 2^55547419 is an apocalyptic number.

55547419 is the 4714-th heptagonal number.

55547419 is a deficient number, since it is larger than the sum of its proper divisors (25925).

55547419 is a wasteful number, since it uses less digits than its factorization.

55547419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25924.

The product of its digits is 126000, while the sum is 40.

The square root of 55547419 is about 7453.0140882733. The cubic root of 55547419 is about 381.5527852129.

It can be divided in two parts, 555 and 47419, that added together give a palindrome (47974).

The spelling of 55547419 in words is "fifty-five million, five hundred forty-seven thousand, four hundred nineteen".