221831571009 has 8 divisors (see below), whose sum is σ = 295783309152. Its totient is φ = 147883773440.

The previous prime is 221831570971. The next prime is 221831571023. The reversal of 221831571009 is 900175138122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221831571009 - 2²³ = 221823182401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221831501009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851187 + ... + 1080824.

It is an arithmetic number, because the mean of its divisors is an integer number (36972913644).

Almost surely, 2^221831571009 is an apocalyptic number.

It is an amenable number.

221831571009 is a deficient number, since it is larger than the sum of its proper divisors (73951738143).

221831571009 is a wasteful number, since it uses less digits than its factorization.

221831571009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970287.

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 221831571009 in words is "two hundred twenty-one billion, eight hundred thirty-one million, five hundred seventy-one thousand, nine".