55651549 has 4 divisors (see below), whose sum is σ = 55742364. Its totient is φ = 55560736.

The previous prime is 55651529. The next prime is 55651553. The reversal of 55651549 is 94515655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13271449 + 42380100 = 3643^2 + 6510^2 .

It is a cyclic number.

It is not a de Polignac number, because 55651549 - 2¹¹ = 55649501 is a prime.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55651529) 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, 44482 + ... + 45715.

It is an arithmetic number, because the mean of its divisors is an integer number (13935591).

Almost surely, 2^55651549 is an apocalyptic number.

It is an amenable number.

55651549 is a deficient number, since it is larger than the sum of its proper divisors (90815).

55651549 is an equidigital number, since it uses as much as digits as its factorization.

55651549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90814.

The product of its digits is 135000, while the sum is 40.

The square root of 55651549 is about 7459.9965817687. The cubic root of 55651549 is about 381.7910578530.

The spelling of 55651549 in words is "fifty-five million, six hundred fifty-one thousand, five hundred forty-nine".