221500651206 has 16 divisors (see below), whose sum is σ = 444157968384. Its totient is φ = 73640772744.

The previous prime is 221500651111. The next prime is 221500651271. The reversal of 221500651206 is 602156005122.

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, 48191926 + ... + 48196521.

It is an arithmetic number, because the mean of its divisors is an integer number (27759873024).

Almost surely, 2^221500651206 is an apocalyptic number.

221500651206 is an abundant number, since it is smaller than the sum of its proper divisors (222657317178).

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

221500651206 is a wasteful number, since it uses less digits than its factorization.

221500651206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96388835.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 221500651206 its reverse (602156005122), we get a palindrome (823656656328).

The spelling of 221500651206 in words is "two hundred twenty-one billion, five hundred million, six hundred fifty-one thousand, two hundred six".