53221099 has 4 divisors (see below), whose sum is σ = 53295840. Its totient is φ = 53146360.

The previous prime is 53221093. The next prime is 53221111. The reversal of 53221099 is 99012235.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53221099 - 2¹⁷ = 53090027 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53221099.

It is not an unprimeable number, because it can be changed into a prime (53221093) 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, 36292 + ... + 37729.

It is an arithmetic number, because the mean of its divisors is an integer number (13323960).

Almost surely, 2^53221099 is an apocalyptic number.

53221099 is a deficient number, since it is larger than the sum of its proper divisors (74741).

53221099 is an equidigital number, since it uses as much as digits as its factorization.

53221099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74740.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 53221099 is about 7295.2792270070. The cubic root of 53221099 is about 376.1501847415.

The spelling of 53221099 in words is "fifty-three million, two hundred twenty-one thousand, ninety-nine".