55471613 has 4 divisors (see below), whose sum is σ = 55778268. Its totient is φ = 55164960.

The previous prime is 55471579. The next prime is 55471627. The reversal of 55471613 is 31617455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31617455 = 5 ⋅6323491.

It can be written as a sum of positive squares in 2 ways, for example, as 2079364 + 53392249 = 1442^2 + 7307^2 .

It is a cyclic number.

It is not a de Polignac number, because 55471613 - 2¹⁰ = 55470589 is a prime.

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 55471613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55476613) 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, 153056 + ... + 153417.

It is an arithmetic number, because the mean of its divisors is an integer number (13944567).

Almost surely, 2^55471613 is an apocalyptic number.

It is an amenable number.

55471613 is a deficient number, since it is larger than the sum of its proper divisors (306655).

55471613 is a wasteful number, since it uses less digits than its factorization.

55471613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306654.

The product of its digits is 12600, while the sum is 32.

The square root of 55471613 is about 7447.9267585013. The cubic root of 55471613 is about 381.3791368326.

The spelling of 55471613 in words is "fifty-five million, four hundred seventy-one thousand, six hundred thirteen".