221132402 has 8 divisors (see below), whose sum is σ = 339412656. Its totient is φ = 107994852.

The previous prime is 221132399. The next prime is 221132423. The reversal of 221132402 is 204231122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285568 + ... + 1285739.

It is an arithmetic number, because the mean of its divisors is an integer number (42426582).

Almost surely, 2^221132402 is an apocalyptic number.

221132402 is a deficient number, since it is larger than the sum of its proper divisors (118280254).

221132402 is a wasteful number, since it uses less digits than its factorization.

221132402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571352.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221132402 is about 14870.5212417050. The cubic root of 221132402 is about 604.7150738120.

Adding to 221132402 its reverse (204231122), we get a palindrome (425363524).

The spelling of 221132402 in words is "two hundred twenty-one million, one hundred thirty-two thousand, four hundred two".