221535321400226 has 16 divisors (see below), whose sum is σ = 346877075160000. Its totient is φ = 105913133494608.

The previous prime is 221535321400213. The next prime is 221535321400231. The reversal of 221535321400226 is 622004123535122.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221535321400226.

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, 875825756 + ... + 876078663.

It is an arithmetic number, because the mean of its divisors is an integer number (21679817197500).

Almost surely, 2^{221535321400226} is an apocalyptic number.

221535321400226 is a deficient number, since it is larger than the sum of its proper divisors (125341753759774).

221535321400226 is a wasteful number, since it uses less digits than its factorization.

221535321400226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751907193.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 221535321400226 its reverse (622004123535122), we get a palindrome (843539444935348).

The spelling of 221535321400226 in words is "two hundred twenty-one trillion, five hundred thirty-five billion, three hundred twenty-one million, four hundred thousand, two hundred twenty-six".