221115704 has 16 divisors (see below), whose sum is σ = 414778320. Its totient is φ = 110508160.

The previous prime is 221115703. The next prime is 221115709. The reversal of 221115704 is 407511122.

It is a super-3 number, since 3×221115704³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221115704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221115703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18464 + ... + 27984.

It is an arithmetic number, because the mean of its divisors is an integer number (25923645).

Almost surely, 2^221115704 is an apocalyptic number.

It is an amenable number.

221115704 is a deficient number, since it is larger than the sum of its proper divisors (193662616).

221115704 is a wasteful number, since it uses less digits than its factorization.

221115704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12430 (or 12426 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 221115704 is about 14869.9597847472. The cubic root of 221115704 is about 604.6998524840.

Adding to 221115704 its reverse (407511122), we get a palindrome (628626826).

The spelling of 221115704 in words is "two hundred twenty-one million, one hundred fifteen thousand, seven hundred four".