221230463 has 4 divisors (see below), whose sum is σ = 221508840. Its totient is φ = 220952088.

The previous prime is 221230459. The next prime is 221230481. The reversal of 221230463 is 364032122.

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 221230463 - 2² = 221230459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221230423) 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, 137993 + ... + 139586.

It is an arithmetic number, because the mean of its divisors is an integer number (55377210).

Almost surely, 2^221230463 is an apocalyptic number.

221230463 is a deficient number, since it is larger than the sum of its proper divisors (278377).

221230463 is an equidigital number, since it uses as much as digits as its factorization.

221230463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278376.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 221230463 is about 14873.8180370744. The cubic root of 221230463 is about 604.8044474197.

Adding to 221230463 its reverse (364032122), we get a palindrome (585262585).

The spelling of 221230463 in words is "two hundred twenty-one million, two hundred thirty thousand, four hundred sixty-three".