258865513 has 8 divisors (see below), whose sum is σ = 274324680. Its totient is φ = 243841920.

The previous prime is 258865423. The next prime is 258865543. The reversal of 258865513 is 315568852.

It can be written as a sum of positive squares in 4 ways, for example, as 4048144 + 254817369 = 2012^2 + 15963^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 258865513 - 2¹³ = 258857321 is a prime.

It is a super-2 number, since 2×258865513² = 134022707641506338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 258865513.

It is not an unprimeable number, because it can be changed into a prime (258865543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107670 + ... + 110047.

It is an arithmetic number, because the mean of its divisors is an integer number (34290585).

Almost surely, 2^258865513 is an apocalyptic number.

It is an amenable number.

258865513 is a deficient number, since it is larger than the sum of its proper divisors (15459167).

258865513 is a wasteful number, since it uses less digits than its factorization.

258865513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217787.

The product of its digits is 288000, while the sum is 43.

The square root of 258865513 is about 16089.2980891026. The cubic root of 258865513 is about 637.3207599644.

The spelling of 258865513 in words is "two hundred fifty-eight million, eight hundred sixty-five thousand, five hundred thirteen".