211221463 has 8 divisors (see below), whose sum is σ = 216893376. Its totient is φ = 205574400.

The previous prime is 211221421. The next prime is 211221469. The reversal of 211221463 is 364122112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211221463 - 2⁹ = 211220951 is a prime.

It is a super-2 number, since 2×211221463² = 89229012863720738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11695 + ... + 23647.

It is an arithmetic number, because the mean of its divisors is an integer number (27111672).

Almost surely, 2^211221463 is an apocalyptic number.

211221463 is a deficient number, since it is larger than the sum of its proper divisors (5671913).

211221463 is a wasteful number, since it uses less digits than its factorization.

211221463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12425.

The product of its digits is 576, while the sum is 22.

The square root of 211221463 is about 14533.4601179485. The cubic root of 211221463 is about 595.5423936255.

Adding to 211221463 its reverse (364122112), we get a palindrome (575343575).

The spelling of 211221463 in words is "two hundred eleven million, two hundred twenty-one thousand, four hundred sixty-three".