516215 has 20 divisors (see below), whose sum is σ = 739464. Its totient is φ = 345744.

The previous prime is 516209. The next prime is 516223. The reversal of 516215 is 512615.

It is not a de Polignac number, because 516215 - 2⁴ = 516199 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11984 + ... + 12026.

2⁵¹⁶²¹⁵ is an apocalyptic number.

516215 is a deficient number, since it is larger than the sum of its proper divisors (223249).

516215 is an frugal number, since it uses more digits than its factorization.

516215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 55 counting only the distinct ones).

The product of its digits is 300, while the sum is 20.

The square root of 516215 is about 718.4810366321. The cubic root of 516215 is about 80.2189315656.

Subtracting from 516215 its reverse (512615), we obtain a square (3600 = 60²).

The spelling of 516215 in words is "five hundred sixteen thousand, two hundred fifteen".