513215 has 4 divisors (see below), whose sum is σ = 615864. Its totient is φ = 410568.

The previous prime is 513203. The next prime is 513239. The reversal of 513215 is 512315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513215 - 2⁸ = 512959 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 513193 and 513202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51317 + ... + 51326.

It is an arithmetic number, because the mean of its divisors is an integer number (153966).

2⁵¹³²¹⁵ is an apocalyptic number.

513215 is a deficient number, since it is larger than the sum of its proper divisors (102649).

513215 is a wasteful number, since it uses less digits than its factorization.

513215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102648.

The product of its digits is 150, while the sum is 17.

The square root of 513215 is about 716.3902567735. The cubic root of 513215 is about 80.0632312594.

Subtracting from 513215 its reverse (512315), we obtain a square (900 = 30²).

The spelling of 513215 in words is "five hundred thirteen thousand, two hundred fifteen".