221625466 has 4 divisors (see below), whose sum is σ = 332438202. Its totient is φ = 110812732.

The previous prime is 221625461. The next prime is 221625473. The reversal of 221625466 is 664526122.

221625466 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 192238225 + 29387241 = 13865^2 + 5421^2 .

It is not an unprimeable number, because it can be changed into a prime (221625461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55406365 + ... + 55406368.

Almost surely, 2^221625466 is an apocalyptic number.

221625466 is a deficient number, since it is larger than the sum of its proper divisors (110812736).

221625466 is a wasteful number, since it uses less digits than its factorization.

221625466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110812735.

The product of its digits is 34560, while the sum is 34.

The square root of 221625466 is about 14887.0905821117. The cubic root of 221625466 is about 605.1641892099.

The spelling of 221625466 in words is "two hundred twenty-one million, six hundred twenty-five thousand, four hundred sixty-six".