513455111631 has 96 divisors (see below), whose sum is σ = 930425633280. Its totient is φ = 265072435200.

The previous prime is 513455111599. The next prime is 513455111641. The reversal of 513455111631 is 136111554315.

513455111631 is a `hidden beast` number, since 5 + 1 + 3 + 4 + 5 + 5 + 1 + 11 + 631 = 666.

It is not a de Polignac number, because 513455111631 - 2⁵ = 513455111599 is a prime.

It is a super-2 number, since 2×513455111631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513455111641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 92196015 + ... + 92201583.

It is an arithmetic number, because the mean of its divisors is an integer number (9691933680).

Almost surely, 2^513455111631 is an apocalyptic number.

513455111631 is a deficient number, since it is larger than the sum of its proper divisors (416970521649).

513455111631 is a wasteful number, since it uses less digits than its factorization.

513455111631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397 (or 6394 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

Adding to 513455111631 its reverse (136111554315), we get a palindrome (649566665946).

The spelling of 513455111631 in words is "five hundred thirteen billion, four hundred fifty-five million, one hundred eleven thousand, six hundred thirty-one".