133550021406 has 24 divisors (see below), whose sum is σ = 274514085720. Its totient is φ = 43313517792.

The previous prime is 133550021401. The next prime is 133550021441. The reversal of 133550021406 is 604120055331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133550021401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8121201 + ... + 8137628.

It is an arithmetic number, because the mean of its divisors is an integer number (11438086905).

Almost surely, 2^133550021406 is an apocalyptic number.

133550021406 is an abundant number, since it is smaller than the sum of its proper divisors (140964064314).

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

133550021406 is a wasteful number, since it uses less digits than its factorization.

133550021406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16258908 (or 16258871 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 133550021406 its reverse (604120055331), we get a palindrome (737670076737).

The spelling of 133550021406 in words is "one hundred thirty-three billion, five hundred fifty million, twenty-one thousand, four hundred six".