133231513454536 has 24 divisors (see below), whose sum is σ = 290594244908070. Its totient is φ = 57099220051776.

The previous prime is 133231513454513. The next prime is 133231513454579. The reversal of 133231513454536 is 635454315132331.

It can be written as a sum of positive squares in only one way, i.e., 117197815730436 + 16033697724100 = 10825794^2 + 4004210^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 133231513454536.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169938154525 + ... + 169938155308.

Almost surely, 2^{133231513454536} is an apocalyptic number.

It is an amenable number.

133231513454536 is an abundant number, since it is smaller than the sum of its proper divisors (157362731453534).

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

133231513454536 is a wasteful number, since it uses less digits than its factorization.

133231513454536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339876309853 (or 339876309842 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 49.

Adding to 133231513454536 its reverse (635454315132331), we get a palindrome (768685828586867).

The spelling of 133231513454536 in words is "one hundred thirty-three trillion, two hundred thirty-one billion, five hundred thirteen million, four hundred fifty-four thousand, five hundred thirty-six".