221362153 has 4 divisors (see below), whose sum is σ = 221412420. Its totient is φ = 221311888.

The previous prime is 221362147. The next prime is 221362177. The reversal of 221362153 is 351263122.

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 110944089 + 110418064 = 10533^2 + 10508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221362153 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (221369153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17818 + ... + 27571.

It is an arithmetic number, because the mean of its divisors is an integer number (55353105).

Almost surely, 2^221362153 is an apocalyptic number.

It is an amenable number.

221362153 is a deficient number, since it is larger than the sum of its proper divisors (50267).

221362153 is an equidigital number, since it uses as much as digits as its factorization.

221362153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50266.

The product of its digits is 2160, while the sum is 25.

The square root of 221362153 is about 14878.2442848610. The cubic root of 221362153 is about 604.9244292376.

The spelling of 221362153 in words is "two hundred twenty-one million, three hundred sixty-two thousand, one hundred fifty-three".