381530133 has 24 divisors (see below), whose sum is σ = 597758616. Its totient is φ = 233548800.

The previous prime is 381530131. The next prime is 381530147. The reversal of 381530133 is 331035183.

It can be written as a sum of positive squares in 4 ways, for example, as 29517489 + 352012644 = 5433^2 + 18762^2 .

It is not a de Polignac number, because 381530133 - 2¹ = 381530131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381530097 and 381530106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381530131) 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, 24138 + ... + 36683.

It is an arithmetic number, because the mean of its divisors is an integer number (24906609).

Almost surely, 2^381530133 is an apocalyptic number.

It is an amenable number.

381530133 is a deficient number, since it is larger than the sum of its proper divisors (216228483).

381530133 is a wasteful number, since it uses less digits than its factorization.

381530133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60885 (or 60882 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 381530133 is about 19532.7963435858. The cubic root of 381530133 is about 725.2865346995.

The spelling of 381530133 in words is "three hundred eighty-one million, five hundred thirty thousand, one hundred thirty-three".