513985605 has 32 divisors (see below), whose sum is σ = 940800000. Its totient is φ = 234729792.

The previous prime is 513985603. The next prime is 513985607. The reversal of 513985605 is 506589315.

It is an interprime number because it is at equal distance from previous prime (513985603) and next prime (513985607).

It is not a de Polignac number, because 513985605 - 2¹ = 513985603 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513985601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145146 + ... + 148644.

It is an arithmetic number, because the mean of its divisors is an integer number (29400000).

Almost surely, 2^513985605 is an apocalyptic number.

It is an amenable number.

513985605 is a deficient number, since it is larger than the sum of its proper divisors (426814395).

513985605 is a wasteful number, since it uses less digits than its factorization.

513985605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913.

The product of its (nonzero) digits is 162000, while the sum is 42.

The square root of 513985605 is about 22671.2506271710. The cubic root of 513985605 is about 801.0328352611.

The spelling of 513985605 in words is "five hundred thirteen million, nine hundred eighty-five thousand, six hundred five".