258215 has 8 divisors (see below), whose sum is σ = 317328. Its totient is φ = 201600.

The previous prime is 258211. The next prime is 258233. The reversal of 258215 is 512852.

258215 = T₁₇₈ + T₁₇₉ + ... + T₁₉₂.

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

It is not a de Polignac number, because 258215 - 2² = 258211 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 (258211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386 + ... + 815.

It is an arithmetic number, because the mean of its divisors is an integer number (39666).

2²⁵⁸²¹⁵ is an apocalyptic number.

258215 is a deficient number, since it is larger than the sum of its proper divisors (59113).

258215 is a wasteful number, since it uses less digits than its factorization.

258215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249.

The product of its digits is 800, while the sum is 23.

The square root of 258215 is about 508.1486003129. The cubic root of 258215 is about 63.6786462964.

The spelling of 258215 in words is "two hundred fifty-eight thousand, two hundred fifteen".