258282221 has 4 divisors (see below), whose sum is σ = 258338172. Its totient is φ = 258226272.

The previous prime is 258282161. The next prime is 258282223. The reversal of 258282221 is 122282852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212868100 + 45414121 = 14590^2 + 6739^2 .

It is a cyclic number.

It is not a de Polignac number, because 258282221 - 2²⁶ = 191173357 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 (258282223) 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, 20360 + ... + 30513.

It is an arithmetic number, because the mean of its divisors is an integer number (64584543).

Almost surely, 2^258282221 is an apocalyptic number.

It is an amenable number.

258282221 is a deficient number, since it is larger than the sum of its proper divisors (55951).

258282221 is an equidigital number, since it uses as much as digits as its factorization.

258282221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55950.

The product of its digits is 10240, while the sum is 32.

The square root of 258282221 is about 16071.1611590451. The cubic root of 258282221 is about 636.8417162854.

The spelling of 258282221 in words is "two hundred fifty-eight million, two hundred eighty-two thousand, two hundred twenty-one".