513646361 has 4 divisors (see below), whose sum is σ = 540680400. Its totient is φ = 486612324.

The previous prime is 513646349. The next prime is 513646369. The reversal of 513646361 is 163646315.

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 513646361 - 2¹⁰ = 513645337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513646369) 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, 13516991 + ... + 13517028.

It is an arithmetic number, because the mean of its divisors is an integer number (135170100).

Almost surely, 2^513646361 is an apocalyptic number.

It is an amenable number.

513646361 is a deficient number, since it is larger than the sum of its proper divisors (27034039).

513646361 is a wasteful number, since it uses less digits than its factorization.

513646361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27034038.

The product of its digits is 38880, while the sum is 35.

The square root of 513646361 is about 22663.7675817592. The cubic root of 513646361 is about 800.8565622366.

The spelling of 513646361 in words is "five hundred thirteen million, six hundred forty-six thousand, three hundred sixty-one".