207221073 has 16 divisors (see below), whose sum is σ = 282648576. Its totient is φ = 134980560.

The previous prime is 207221071. The next prime is 207221089. The reversal of 207221073 is 370122702.

207221073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 207221073 - 2¹ = 207221071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207221071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138990 + ... + 140472.

It is an arithmetic number, because the mean of its divisors is an integer number (17665536).

Almost surely, 2^207221073 is an apocalyptic number.

It is an amenable number.

207221073 is a deficient number, since it is larger than the sum of its proper divisors (75427503).

207221073 is a wasteful number, since it uses less digits than its factorization.

207221073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 207221073 is about 14395.1753375914. The cubic root of 207221073 is about 591.7586833369.

Adding to 207221073 its reverse (370122702), we get a palindrome (577343775).

The spelling of 207221073 in words is "two hundred seven million, two hundred twenty-one thousand, seventy-three".