133772530 has 16 divisors (see below), whose sum is σ = 245334744. Its totient is φ = 52499200.

The previous prime is 133772491. The next prime is 133772537. The reversal of 133772530 is 35277331.

It can be written as a sum of positive squares in 4 ways, for example, as 133379401 + 393129 = 11549^2 + 627^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133772492 and 133772501.

It is not an unprimeable number, because it can be changed into a prime (133772537) 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 7 ways as a sum of consecutive naturals, for example, 125671 + ... + 126730.

Almost surely, 2^133772530 is an apocalyptic number.

133772530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133772530 is a deficient number, since it is larger than the sum of its proper divisors (111562214).

133772530 is a wasteful number, since it uses less digits than its factorization.

133772530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252461.

The product of its (nonzero) digits is 13230, while the sum is 31.

The square root of 133772530 is about 11566.0075220449. The cubic root of 133772530 is about 511.4332743998.

The spelling of 133772530 in words is "one hundred thirty-three million, seven hundred seventy-two thousand, five hundred thirty".