133631251540 has 48 divisors (see below), whose sum is σ = 282339727488. Its totient is φ = 53126209664.

The previous prime is 133631251529. The next prime is 133631251541. The reversal of 133631251540 is 45152136331.

It is a super-2 number, since 2×133631251540² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133631251496 and 133631251505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133631251541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18344739 + ... + 18352021.

It is an arithmetic number, because the mean of its divisors is an integer number (5882077656).

Almost surely, 2^133631251540 is an apocalyptic number.

133631251540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133631251540 is an abundant number, since it is smaller than the sum of its proper divisors (148708475948).

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

133631251540 is a wasteful number, since it uses less digits than its factorization.

133631251540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12768 (or 12766 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 133631251540 its reverse (45152136331), we get a palindrome (178783387871).

The spelling of 133631251540 in words is "one hundred thirty-three billion, six hundred thirty-one million, two hundred fifty-one thousand, five hundred forty".