221533312046506 has 8 divisors (see below), whose sum is σ = 332300037091140. Its totient is φ = 110766633016128.

The previous prime is 221533312046461. The next prime is 221533312046507. The reversal of 221533312046506 is 605640213335122.

It can be written as a sum of positive squares in 2 ways, for example, as 203103969617025 + 18429342429481 = 14251455^2 + 4292941^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221533312046507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5645730 + ... + 21793138.

Almost surely, 2^{221533312046506} is an apocalyptic number.

221533312046506 is a deficient number, since it is larger than the sum of its proper divisors (110766725044634).

221533312046506 is a wasteful number, since it uses less digits than its factorization.

221533312046506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23007128.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 221533312046506 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, three hundred twelve million, forty-six thousand, five hundred six".