221331002 has 4 divisors (see below), whose sum is σ = 331996506. Its totient is φ = 110665500.

The previous prime is 221330971. The next prime is 221331013. The reversal of 221331002 is 200133122.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 209641441 + 11689561 = 14479^2 + 3419^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55332749 + ... + 55332752.

Almost surely, 2^221331002 is an apocalyptic number.

221331002 is a deficient number, since it is larger than the sum of its proper divisors (110665504).

221331002 is a wasteful number, since it uses less digits than its factorization.

221331002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110665503.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221331002 is about 14877.1973839161. The cubic root of 221331002 is about 604.8960520818.

Adding to 221331002 its reverse (200133122), we get a palindrome (421464124).

The spelling of 221331002 in words is "two hundred twenty-one million, three hundred thirty-one thousand, two".