53218919 has 8 divisors (see below), whose sum is σ = 57448272. Its totient is φ = 49008960.

The previous prime is 53218897. The next prime is 53218927. The reversal of 53218919 is 91981235.

53218919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53218919 - 2⁸ = 53218663 is a prime.

It is a super-2 number, since 2×53218919² = 5664506679057122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53218939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139 + ... + 10379.

It is an arithmetic number, because the mean of its divisors is an integer number (7181034).

Almost surely, 2^53218919 is an apocalyptic number.

53218919 is a deficient number, since it is larger than the sum of its proper divisors (4229353).

53218919 is a wasteful number, since it uses less digits than its factorization.

53218919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697.

The product of its digits is 19440, while the sum is 38.

The square root of 53218919 is about 7295.1298137867. The cubic root of 53218919 is about 376.1450488173.

The spelling of 53218919 in words is "fifty-three million, two hundred eighteen thousand, nine hundred nineteen".