1331031553436 has 48 divisors (see below), whose sum is σ = 2518723843776. Its totient is φ = 611817782784.

The previous prime is 1331031553409. The next prime is 1331031553447. The reversal of 1331031553436 is 6343551301331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331031553436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18046145 + ... + 18119751.

It is an arithmetic number, because the mean of its divisors is an integer number (52473413412).

Almost surely, 2^{1331031553436} is an apocalyptic number.

It is an amenable number.

1331031553436 is a deficient number, since it is larger than the sum of its proper divisors (1187692290340).

1331031553436 is a wasteful number, since it uses less digits than its factorization.

1331031553436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75038 (or 75036 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 38.

Adding to 1331031553436 its reverse (6343551301331), we get a palindrome (7674582854767).

The spelling of 1331031553436 in words is "one trillion, three hundred thirty-one billion, thirty-one million, five hundred fifty-three thousand, four hundred thirty-six".