133123231555 has 16 divisors (see below), whose sum is σ = 161378330688. Its totient is φ = 105416640000.

The previous prime is 133123231541. The next prime is 133123231573. The reversal of 133123231555 is 555132321331.

It is not a de Polignac number, because 133123231555 - 2¹¹ = 133123229507 is a prime.

It is a super-2 number, since 2×133123231555² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133123231555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101586 + ... + 525895.

It is an arithmetic number, because the mean of its divisors is an integer number (10086145668).

Almost surely, 2^133123231555 is an apocalyptic number.

133123231555 is a deficient number, since it is larger than the sum of its proper divisors (28255099133).

133123231555 is a wasteful number, since it uses less digits than its factorization.

133123231555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627918.

The product of its digits is 40500, while the sum is 34.

Adding to 133123231555 its reverse (555132321331), we get a palindrome (688255552886).

The spelling of 133123231555 in words is "one hundred thirty-three billion, one hundred twenty-three million, two hundred thirty-one thousand, five hundred fifty-five".