464889221 has 2 divisors, whose sum is σ = 464889222. Its totient is φ = 464889220.

The previous prime is 464889209. The next prime is 464889301. The reversal of 464889221 is 122988464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250588900 + 214300321 = 15830^2 + 14639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-464889221 is a prime.

It is a super-2 number, since 2×464889221² = 432243975603973682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (464889421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232444610 + 232444611.

It is an arithmetic number, because the mean of its divisors is an integer number (232444611).

Almost surely, 2^464889221 is an apocalyptic number.

It is an amenable number.

464889221 is a deficient number, since it is larger than the sum of its proper divisors (1).

464889221 is an equidigital number, since it uses as much as digits as its factorization.

464889221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 44.

The square root of 464889221 is about 21561.2898732891. The cubic root of 464889221 is about 774.6695620790.

The spelling of 464889221 in words is "four hundred sixty-four million, eight hundred eighty-nine thousand, two hundred twenty-one".