513261213 has 4 divisors (see below), whose sum is σ = 684348288. Its totient is φ = 342174140.

The previous prime is 513261211. The next prime is 513261251. The reversal of 513261213 is 312162315.

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 a cyclic number.

It is not a de Polignac number, because 513261213 - 2¹ = 513261211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513261211) 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, 85543533 + ... + 85543538.

It is an arithmetic number, because the mean of its divisors is an integer number (171087072).

Almost surely, 2^513261213 is an apocalyptic number.

It is an amenable number.

513261213 is a deficient number, since it is larger than the sum of its proper divisors (171087075).

513261213 is a wasteful number, since it uses less digits than its factorization.

513261213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171087074.

The product of its digits is 1080, while the sum is 24.

The square root of 513261213 is about 22655.2689897957. The cubic root of 513261213 is about 800.6563431407.

It can be divided in two parts, 513 and 261213, that added together give a triangular number (261726 = T₇₂₃).

The spelling of 513261213 in words is "five hundred thirteen million, two hundred sixty-one thousand, two hundred thirteen".