258010221 has 16 divisors (see below), whose sum is σ = 393801728. Its totient is φ = 147193200.

The previous prime is 258010219. The next prime is 258010283. The reversal of 258010221 is 122010852.

It is a happy number.

It is not a de Polignac number, because 258010221 - 2¹ = 258010219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258010211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3516 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (24612608).

Almost surely, 2^258010221 is an apocalyptic number.

258010221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

258010221 is a deficient number, since it is larger than the sum of its proper divisors (135791507).

258010221 is a wasteful number, since it uses less digits than its factorization.

258010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 258010221 is about 16062.6965668906. The cubic root of 258010221 is about 636.6180826329.

The spelling of 258010221 in words is "two hundred fifty-eight million, ten thousand, two hundred twenty-one".