465646221 has 24 divisors (see below), whose sum is σ = 693593784. Its totient is φ = 300810240.

The previous prime is 465646217. The next prime is 465646229. The reversal of 465646221 is 122646564.

465646221 is a `hidden beast` number, since 4 + 6 + 5 + 646 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 357777225 + 107868996 = 18915^2 + 10386^2 .

It is not a de Polignac number, because 465646221 - 2² = 465646217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (465646229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82861 + ... + 88301.

It is an arithmetic number, because the mean of its divisors is an integer number (28899741).

Almost surely, 2^465646221 is an apocalyptic number.

It is an amenable number.

465646221 is a deficient number, since it is larger than the sum of its proper divisors (227947563).

465646221 is a wasteful number, since it uses less digits than its factorization.

465646221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741 (or 5738 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 465646221 is about 21578.8373412471. The cubic root of 465646221 is about 775.0898104730.

The spelling of 465646221 in words is "four hundred sixty-five million, six hundred forty-six thousand, two hundred twenty-one".