221010145 has 8 divisors (see below), whose sum is σ = 265395456. Its totient is φ = 176685936.

The previous prime is 221010143. The next prime is 221010161. The reversal of 221010145 is 541010122.

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 221010145 - 2¹ = 221010143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010143) 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, 6897 + ... + 22126.

It is an arithmetic number, because the mean of its divisors is an integer number (33174432).

Almost surely, 2^221010145 is an apocalyptic number.

It is an amenable number.

221010145 is a deficient number, since it is larger than the sum of its proper divisors (44385311).

221010145 is a wasteful number, since it uses less digits than its factorization.

221010145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30551.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 221010145 is about 14866.4099566775. The cubic root of 221010145 is about 604.6036107565.

Adding to 221010145 its reverse (541010122), we get a palindrome (762020267).

The spelling of 221010145 in words is "two hundred twenty-one million, ten thousand, one hundred forty-five".