53021849 has 4 divisors (see below), whose sum is σ = 53568564. Its totient is φ = 52475136.

The previous prime is 53021833. The next prime is 53021863. The reversal of 53021849 is 94812035.

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 20611600 + 32410249 = 4540^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 53021849 - 2⁴ = 53021833 is a prime.

It is a super-2 number, since 2×53021849² = 5622632942757602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53071849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273212 + ... + 273405.

It is an arithmetic number, because the mean of its divisors is an integer number (13392141).

Almost surely, 2^53021849 is an apocalyptic number.

It is an amenable number.

53021849 is a deficient number, since it is larger than the sum of its proper divisors (546715).

53021849 is an equidigital number, since it uses as much as digits as its factorization.

53021849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546714.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 53021849 is about 7281.6103301399. The cubic root of 53021849 is about 375.6801853669.

The spelling of 53021849 in words is "fifty-three million, twenty-one thousand, eight hundred forty-nine".