53218890 has 64 divisors (see below), whose sum is σ = 144633600. Its totient is φ = 13920192.

The previous prime is 53218889. The next prime is 53218897. The reversal of 53218890 is 9881235.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53218897) 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 31 ways as a sum of consecutive naturals, for example, 12451 + ... + 16169.

It is an arithmetic number, because the mean of its divisors is an integer number (2259900).

Almost surely, 2^53218890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53218890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72316800).

53218890 is an abundant number, since it is smaller than the sum of its proper divisors (91414710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53218890 is a wasteful number, since it uses less digits than its factorization.

53218890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788 (or 3782 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 53218890 is about 7295.1278261590. The cubic root of 53218890 is about 376.1449804944.

The spelling of 53218890 in words is "fifty-three million, two hundred eighteen thousand, eight hundred ninety".