55519693 has 4 divisors (see below), whose sum is σ = 55648348. Its totient is φ = 55391040.

The previous prime is 55519687. The next prime is 55519703. The reversal of 55519693 is 39691555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39691555 = 5 ⋅7938311.

It can be written as a sum of positive squares in 2 ways, for example, as 15539364 + 39980329 = 3942^2 + 6323^2 .

It is a cyclic number.

It is not a de Polignac number, because 55519693 - 2⁹ = 55519181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55619693) 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, 63678 + ... + 64543.

It is an arithmetic number, because the mean of its divisors is an integer number (13912087).

Almost surely, 2^55519693 is an apocalyptic number.

It is an amenable number.

55519693 is a deficient number, since it is larger than the sum of its proper divisors (128655).

55519693 is a wasteful number, since it uses less digits than its factorization.

55519693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128654.

The product of its digits is 182250, while the sum is 43.

The square root of 55519693 is about 7451.1538032710. The cubic root of 55519693 is about 381.4892917549.

The spelling of 55519693 in words is "fifty-five million, five hundred nineteen thousand, six hundred ninety-three".