133640251430 has 48 divisors (see below), whose sum is σ = 279892882080. Its totient is φ = 45808616448.

The previous prime is 133640251427. The next prime is 133640251439. The reversal of 133640251430 is 34152046331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133640251439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2184134 + ... + 2244486.

It is an arithmetic number, because the mean of its divisors is an integer number (5831101710).

Almost surely, 2^133640251430 is an apocalyptic number.

133640251430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133640251430 is an abundant number, since it is smaller than the sum of its proper divisors (146252630650).

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

133640251430 is a wasteful number, since it uses less digits than its factorization.

133640251430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64893 (or 64886 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 133640251430 its reverse (34152046331), we get a palindrome (167792297761).

The spelling of 133640251430 in words is "one hundred thirty-three billion, six hundred forty million, two hundred fifty-one thousand, four hundred thirty".