221463564 has 24 divisors (see below), whose sum is σ = 590569728. Its totient is φ = 63275280.

The previous prime is 221463551. The next prime is 221463587. The reversal of 221463564 is 465364122.

221463564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221463564² = 98092220359164192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318152 + ... + 1318319.

It is an arithmetic number, because the mean of its divisors is an integer number (24607072).

Almost surely, 2^221463564 is an apocalyptic number.

It is an amenable number.

221463564 is an abundant number, since it is smaller than the sum of its proper divisors (369106164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221463564 is a wasteful number, since it uses less digits than its factorization.

221463564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636485 (or 2636483 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 221463564 is about 14881.6519244337. The cubic root of 221463564 is about 605.0167916474.

The spelling of 221463564 in words is "two hundred twenty-one million, four hundred sixty-three thousand, five hundred sixty-four".