513231231542544 has 30 divisors (see below), whose sum is σ = 1436334627164606. Its totient is φ = 171077077180800.

The previous prime is 513231231542531. The next prime is 513231231542569. The reversal of 513231231542544 is 445245132132315.

513231231542544 is a `hidden beast` number, since 5 + 1 + 3 + 2 + 31 + 2 + 31 + 5 + 42 + 544 = 666.

It can be written as a sum of positive squares in only one way, i.e., 307581864912144 + 205649366630400 = 17538012^2 + 14340480^2 .

It is a super-2 number, since 2×513231231542544² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513231231542544.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1782052887157 + ... + 1782052887444.

Almost surely, 2^{513231231542544} is an apocalyptic number.

It is an amenable number.

513231231542544 is an abundant number, since it is smaller than the sum of its proper divisors (923103395622062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513231231542544 is a wasteful number, since it uses less digits than its factorization.

513231231542544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564105774615 (or 3564105774606 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

Adding to 513231231542544 its reverse (445245132132315), we get a palindrome (958476363674859).

The spelling of 513231231542544 in words is "five hundred thirteen trillion, two hundred thirty-one billion, two hundred thirty-one million, five hundred forty-two thousand, five hundred forty-four".