221429007 has 12 divisors (see below), whose sum is σ = 330871320. Its totient is φ = 142528848.

The previous prime is 221428997. The next prime is 221429041. The reversal of 221429007 is 700924122.

It is not a de Polignac number, because 221429007 - 2¹² = 221424911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221429077) 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, 423933 + ... + 424454.

It is an arithmetic number, because the mean of its divisors is an integer number (27572610).

Almost surely, 2^221429007 is an apocalyptic number.

221429007 is a deficient number, since it is larger than the sum of its proper divisors (109442313).

221429007 is a wasteful number, since it uses less digits than its factorization.

221429007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848422 (or 848419 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 221429007 is about 14880.4908185181. The cubic root of 221429007 is about 604.9853212294.

The spelling of 221429007 in words is "two hundred twenty-one million, four hundred twenty-nine thousand, seven".