221326672 has 40 divisors (see below), whose sum is σ = 518913216. Its totient is φ = 89273856.

The previous prime is 221326657. The next prime is 221326681. The reversal of 221326672 is 276623122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56218 + ... + 60025.

Almost surely, 2^221326672 is an apocalyptic number.

It is an amenable number.

221326672 is an abundant number, since it is smaller than the sum of its proper divisors (297586544).

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

221326672 is a wasteful number, since it uses less digits than its factorization.

221326672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116275 (or 116269 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 221326672 is about 14877.0518584833. The cubic root of 221326672 is about 604.8921074364.

Adding to 221326672 its reverse (276623122), we get a palindrome (497949794).

The spelling of 221326672 in words is "two hundred twenty-one million, three hundred twenty-six thousand, six hundred seventy-two".