258031717 has 4 divisors (see below), whose sum is σ = 258163180. Its totient is φ = 257900256.

The previous prime is 258031703. The next prime is 258031727. The reversal of 258031717 is 717130852.

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 98287396 + 159744321 = 9914^2 + 12639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258031717 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 (258031727) 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, 62742 + ... + 66727.

It is an arithmetic number, because the mean of its divisors is an integer number (64540795).

Almost surely, 2^258031717 is an apocalyptic number.

It is an amenable number.

258031717 is a deficient number, since it is larger than the sum of its proper divisors (131463).

258031717 is a wasteful number, since it uses less digits than its factorization.

258031717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131462.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 258031717 is about 16063.3656809524. The cubic root of 258031717 is about 636.6357619871.

The spelling of 258031717 in words is "two hundred fifty-eight million, thirty-one thousand, seven hundred seventeen".