221105465 has 16 divisors (see below), whose sum is σ = 306179328. Its totient is φ = 150140736.

The previous prime is 221105461. The next prime is 221105473. The reversal of 221105465 is 564501122.

It is a cyclic number.

It is not a de Polignac number, because 221105465 - 2² = 221105461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221105461) 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, 27062 + ... + 34271.

It is an arithmetic number, because the mean of its divisors is an integer number (19136208).

Almost surely, 2^221105465 is an apocalyptic number.

It is an amenable number.

221105465 is a deficient number, since it is larger than the sum of its proper divisors (85073863).

221105465 is a wasteful number, since it uses less digits than its factorization.

221105465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61448.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 221105465 is about 14869.6154960375. The cubic root of 221105465 is about 604.6905185813.

Adding to 221105465 its reverse (564501122), we get a palindrome (785606587).

The spelling of 221105465 in words is "two hundred twenty-one million, one hundred five thousand, four hundred sixty-five".