513391612 has 24 divisors (see below), whose sum is σ = 911252160. Its totient is φ = 253044480.

The previous prime is 513391597. The next prime is 513391633. The reversal of 513391612 is 216193315.

It is a happy 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, 345912 + ... + 347392.

It is an arithmetic number, because the mean of its divisors is an integer number (37968840).

Almost surely, 2^513391612 is an apocalyptic number.

It is an amenable number.

513391612 is a deficient number, since it is larger than the sum of its proper divisors (397860548).

513391612 is a wasteful number, since it uses less digits than its factorization.

513391612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661 (or 2659 counting only the distinct ones).

The product of its digits is 4860, while the sum is 31.

The square root of 513391612 is about 22658.1467026763. The cubic root of 513391612 is about 800.7241422414.

The spelling of 513391612 in words is "five hundred thirteen million, three hundred ninety-one thousand, six hundred twelve".