258385221 has 40 divisors (see below), whose sum is σ = 394944000. Its totient is φ = 168311520.

The previous prime is 258385219. The next prime is 258385241. The reversal of 258385221 is 122583852.

258385221 is a `hidden beast` number, since 2 + 58 + 385 + 221 = 666.

It is not a de Polignac number, because 258385221 - 2¹ = 258385219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258385201) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 953316 + ... + 953586.

It is an arithmetic number, because the mean of its divisors is an integer number (9873600).

Almost surely, 2^258385221 is an apocalyptic number.

It is an amenable number.

258385221 is a deficient number, since it is larger than the sum of its proper divisors (136558779).

258385221 is a wasteful number, since it uses less digits than its factorization.

258385221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 502 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 258385221 is about 16074.3653373936. The cubic root of 258385221 is about 636.9263601026.

The spelling of 258385221 in words is "two hundred fifty-eight million, three hundred eighty-five thousand, two hundred twenty-one".