133125018 has 32 divisors (see below), whose sum is σ = 288456000. Its totient is φ = 40957488.

The previous prime is 133125017. The next prime is 133125019. The reversal of 133125018 is 810521331.

It is an interprime number because it is at equal distance from previous prime (133125017) and next prime (133125019).

It is not an unprimeable number, because it can be changed into a prime (133125017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8133 + ... + 18231.

It is an arithmetic number, because the mean of its divisors is an integer number (9014250).

Almost surely, 2^133125018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133125018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144228000).

133125018 is an abundant number, since it is smaller than the sum of its proper divisors (155330982).

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

133125018 is a wasteful number, since it uses less digits than its factorization.

133125018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10143 (or 10117 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 133125018 is about 11537.9815392468. The cubic root of 133125018 is about 510.6067595747.

Adding to 133125018 its reverse (810521331), we get a palindrome (943646349).

The spelling of 133125018 in words is "one hundred thirty-three million, one hundred twenty-five thousand, eighteen".