53218081 has 8 divisors (see below), whose sum is σ = 60903360. Its totient is φ = 45553488.

The previous prime is 53218079. The next prime is 53218091. The reversal of 53218081 is 18081235.

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

It is a cyclic number.

It is not a de Polignac number, because 53218081 - 2¹ = 53218079 is a prime.

It is a super-2 number, since 2×53218081² = 5664328290645122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53218091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810 + ... + 10348.

It is an arithmetic number, because the mean of its divisors is an integer number (7612920).

Almost surely, 2^53218081 is an apocalyptic number.

It is an amenable number.

53218081 is a deficient number, since it is larger than the sum of its proper divisors (7685279).

53218081 is an equidigital number, since it uses as much as digits as its factorization.

53218081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10343.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 53218081 is about 7295.0723779823. The cubic root of 53218081 is about 376.1430745118.

The spelling of 53218081 in words is "fifty-three million, two hundred eighteen thousand, eighty-one".