221672007 has 12 divisors (see below), whose sum is σ = 323186760. Its totient is φ = 146399568.

The previous prime is 221671997. The next prime is 221672021. The reversal of 221672007 is 700276122.

It is not a de Polignac number, because 221672007 - 2⁴ = 221671991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221672047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114132 + ... + 116057.

It is an arithmetic number, because the mean of its divisors is an integer number (26932230).

Almost surely, 2^221672007 is an apocalyptic number.

221672007 is a deficient number, since it is larger than the sum of its proper divisors (101514753).

221672007 is a wasteful number, since it uses less digits than its factorization.

221672007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230302 (or 230299 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 221672007 is about 14888.6536328843. The cubic root of 221672007 is about 605.2065474216.

The spelling of 221672007 in words is "two hundred twenty-one million, six hundred seventy-two thousand, seven".