513231203253 has 4 divisors (see below), whose sum is σ = 684308271008. Its totient is φ = 342154135500.

The previous prime is 513231203249. The next prime is 513231203357. The reversal of 513231203253 is 352302132315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 513231203253 - 2² = 513231203249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 513231203253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513231208253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85538533873 + ... + 85538533878.

It is an arithmetic number, because the mean of its divisors is an integer number (171077067752).

Almost surely, 2^513231203253 is an apocalyptic number.

It is an amenable number.

513231203253 is a deficient number, since it is larger than the sum of its proper divisors (171077067755).

513231203253 is a wasteful number, since it uses less digits than its factorization.

513231203253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171077067754.

The product of its (nonzero) digits is 16200, while the sum is 30.

Adding to 513231203253 its reverse (352302132315), we get a palindrome (865533335568).

The spelling of 513231203253 in words is "five hundred thirteen billion, two hundred thirty-one million, two hundred three thousand, two hundred fifty-three".