513240211511 has 4 divisors (see below), whose sum is σ = 513328116000. Its totient is φ = 513152307024.

The previous prime is 513240211489. The next prime is 513240211513. The reversal of 513240211511 is 115112042315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513240211511 - 2⁶ = 513240211447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513240211513) 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, 43943486 + ... + 43955163.

It is an arithmetic number, because the mean of its divisors is an integer number (128332029000).

Almost surely, 2^513240211511 is an apocalyptic number.

513240211511 is a deficient number, since it is larger than the sum of its proper divisors (87904489).

513240211511 is an equidigital number, since it uses as much as digits as its factorization.

513240211511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87904488.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 513240211511 its reverse (115112042315), we get a palindrome (628352253826).

The spelling of 513240211511 in words is "five hundred thirteen billion, two hundred forty million, two hundred eleven thousand, five hundred eleven".