221133181504 has 63 divisors (see below), whose sum is σ = 449582273427. Its totient is φ = 107916273024.

The previous prime is 221133181457. The next prime is 221133181583. The reversal of 221133181504 is 405181331122.

The square root of 221133181504 is 470248.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 161764629 + ... + 161765995.

Almost surely, 2^221133181504 is an apocalyptic number.

221133181504 is the 470248-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221133181504

221133181504 is an abundant number, since it is smaller than the sum of its proper divisors (228449091923).

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

221133181504 is an frugal number, since it uses more digits than its factorization.

221133181504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 221133181504 in words is "two hundred twenty-one billion, one hundred thirty-three million, one hundred eighty-one thousand, five hundred four".