513231241631 has 2 divisors, whose sum is σ = 513231241632. Its totient is φ = 513231241630.

The previous prime is 513231241591. The next prime is 513231241639. The reversal of 513231241631 is 136142132315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513231241631 is a prime.

It is a super-2 number, since 2×513231241631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513231241639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256615620815 + 256615620816.

It is an arithmetic number, because the mean of its divisors is an integer number (256615620816).

Almost surely, 2^513231241631 is an apocalyptic number.

513231241631 is a deficient number, since it is larger than the sum of its proper divisors (1).

513231241631 is an equidigital number, since it uses as much as digits as its factorization.

513231241631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

Adding to 513231241631 its reverse (136142132315), we get a palindrome (649373373946).

The spelling of 513231241631 in words is "five hundred thirteen billion, two hundred thirty-one million, two hundred forty-one thousand, six hundred thirty-one".