55691419 has 4 divisors (see below), whose sum is σ = 63647344. Its totient is φ = 47735496.

The previous prime is 55691369. The next prime is 55691453. The reversal of 55691419 is 91419655.

55691419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91419655 = 5 ⋅18283931.

It is a cyclic number.

It is not a de Polignac number, because 55691419 - 2⁷ = 55691291 is a prime.

It is a super-2 number, since 2×55691419² = 6203068300467122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55691219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3977952 + ... + 3977965.

It is an arithmetic number, because the mean of its divisors is an integer number (15911836).

Almost surely, 2^55691419 is an apocalyptic number.

55691419 is a deficient number, since it is larger than the sum of its proper divisors (7955925).

55691419 is an equidigital number, since it uses as much as digits as its factorization.

55691419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7955924.

The product of its digits is 48600, while the sum is 40.

The square root of 55691419 is about 7462.6683565599. The cubic root of 55691419 is about 381.8822106065.

The spelling of 55691419 in words is "fifty-five million, six hundred ninety-one thousand, four hundred nineteen".