513655 has 8 divisors (see below), whose sum is σ = 652752. Its totient is φ = 386688.

The previous prime is 513649. The next prime is 513673. The reversal of 513655 is 556315.

513655 = 178² + 179² + ... + 192².

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 513655 - 2¹⁷ = 382583 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 2937 + ... + 3106.

It is an arithmetic number, because the mean of its divisors is an integer number (81594).

2⁵¹³⁶⁵⁵ is an apocalyptic number.

513655 is a deficient number, since it is larger than the sum of its proper divisors (139097).

513655 is a wasteful number, since it uses less digits than its factorization.

513655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065.

The product of its digits is 2250, while the sum is 25.

The square root of 513655 is about 716.6972861676. The cubic root of 513655 is about 80.0861052071.

The spelling of 513655 in words is "five hundred thirteen thousand, six hundred fifty-five".