221254002 has 24 divisors (see below), whose sum is σ = 479915280. Its totient is φ = 73669560.

The previous prime is 221253983. The next prime is 221254003. The reversal of 221254002 is 200452122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221254003) 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 11 ways as a sum of consecutive naturals, for example, 11149 + ... + 23807.

It is an arithmetic number, because the mean of its divisors is an integer number (19996470).

Almost surely, 2^221254002 is an apocalyptic number.

221254002 is an abundant number, since it is smaller than the sum of its proper divisors (258661278).

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

221254002 is a wasteful number, since it uses less digits than its factorization.

221254002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13638 (or 13635 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 221254002 is about 14874.6093057935. The cubic root of 221254002 is about 604.8258971285.

The spelling of 221254002 in words is "two hundred twenty-one million, two hundred fifty-four thousand, two".