513213660 has 36 divisors (see below), whose sum is σ = 1556748648. Its totient is φ = 136856928.

The previous prime is 513213641. The next prime is 513213661. The reversal of 513213660 is 66312315.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513213661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425414 + ... + 1425773.

It is an arithmetic number, because the mean of its divisors is an integer number (43243018).

Almost surely, 2^513213660 is an apocalyptic number.

It is an amenable number.

513213660 is an abundant number, since it is smaller than the sum of its proper divisors (1043534988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513213660 is a wasteful number, since it uses less digits than its factorization.

513213660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851202 (or 2851197 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 513213660 is about 22654.2194745262. The cubic root of 513213660 is about 800.6316157790.

Adding to 513213660 its reverse (66312315), we get a palindrome (579525975).

The spelling of 513213660 in words is "five hundred thirteen million, two hundred thirteen thousand, six hundred sixty".