513231211633 has 16 divisors (see below), whose sum is σ = 588732672384. Its totient is φ = 438275940480.

The previous prime is 513231211631. The next prime is 513231211657. The reversal of 513231211633 is 336112132315.

It is a happy number.

It is not a de Polignac number, because 513231211633 - 2¹ = 513231211631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513231211595 and 513231211604.

It is not an unprimeable number, because it can be changed into a prime (513231211631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14748891 + ... + 14783647.

It is an arithmetic number, because the mean of its divisors is an integer number (36795792024).

Almost surely, 2^513231211633 is an apocalyptic number.

It is an amenable number.

513231211633 is a deficient number, since it is larger than the sum of its proper divisors (75501460751).

513231211633 is a wasteful number, since it uses less digits than its factorization.

513231211633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42552.

The product of its digits is 9720, while the sum is 31.

Adding to 513231211633 its reverse (336112132315), we get a palindrome (849343343948).

The spelling of 513231211633 in words is "five hundred thirteen billion, two hundred thirty-one million, two hundred eleven thousand, six hundred thirty-three".