221456463 has 4 divisors (see below), whose sum is σ = 295275288. Its totient is φ = 147637640.

The previous prime is 221456453. The next prime is 221456471. The reversal of 221456463 is 364654122.

221456463 is digitally balanced in base 2, 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 is a cyclic number.

It is not a de Polignac number, because 221456463 - 2⁴ = 221456447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221456423) 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, 36909408 + ... + 36909413.

It is an arithmetic number, because the mean of its divisors is an integer number (73818822).

Almost surely, 2^221456463 is an apocalyptic number.

221456463 is a deficient number, since it is larger than the sum of its proper divisors (73818825).

221456463 is an equidigital number, since it uses as much as digits as its factorization.

221456463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73818824.

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

The square root of 221456463 is about 14881.4133401367. The cubic root of 221456463 is about 605.0103251659.

The spelling of 221456463 in words is "two hundred twenty-one million, four hundred fifty-six thousand, four hundred sixty-three".