258005505 has 16 divisors (see below), whose sum is σ = 413130240. Its totient is φ = 137495808.

The previous prime is 258005491. The next prime is 258005509. The reversal of 258005505 is 505500852.

It is not a de Polignac number, because 258005505 - 2⁶ = 258005441 is a prime.

It is a super-2 number, since 2×258005505² = 133133681220610050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (258005509) 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, 15609 + ... + 27561.

It is an arithmetic number, because the mean of its divisors is an integer number (25820640).

Almost surely, 2^258005505 is an apocalyptic number.

It is an amenable number.

258005505 is a deficient number, since it is larger than the sum of its proper divisors (155124735).

258005505 is a wasteful number, since it uses less digits than its factorization.

258005505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13400.

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 258005505 is about 16062.5497664599. The cubic root of 258005505 is about 636.6142038341.

The spelling of 258005505 in words is "two hundred fifty-eight million, five thousand, five hundred five".