53818549 has 4 divisors (see below), whose sum is σ = 56984364. Its totient is φ = 50652736.

The previous prime is 53818543. The next prime is 53818559. The reversal of 53818549 is 94581835.

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 24820324 + 28998225 = 4982^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 53818549 - 2⁵ = 53818517 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 (53818543) 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, 1582882 + ... + 1582915.

It is an arithmetic number, because the mean of its divisors is an integer number (14246091).

Almost surely, 2^53818549 is an apocalyptic number.

It is an amenable number.

53818549 is a deficient number, since it is larger than the sum of its proper divisors (3165815).

53818549 is a wasteful number, since it uses less digits than its factorization.

53818549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165814.

The product of its digits is 172800, while the sum is 43.

The square root of 53818549 is about 7336.1126627118. The cubic root of 53818549 is about 377.5524807525.

The spelling of 53818549 in words is "fifty-three million, eight hundred eighteen thousand, five hundred forty-nine".