133540131 has 8 divisors (see below), whose sum is σ = 178136064. Its totient is φ = 88985480.

The previous prime is 133540103. The next prime is 133540177. The reversal of 133540131 is 131045331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133540131 - 2⁷ = 133540003 is a prime.

It is a super-2 number, since 2×133540131² = 35665933174994322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133540098 and 133540107.

It is not an unprimeable number, because it can be changed into a prime (133540181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755 + ... + 16436.

It is an arithmetic number, because the mean of its divisors is an integer number (22267008).

Almost surely, 2^133540131 is an apocalyptic number.

133540131 is a deficient number, since it is larger than the sum of its proper divisors (44595933).

133540131 is a wasteful number, since it uses less digits than its factorization.

133540131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20641.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 133540131 is about 11555.9565160137. The cubic root of 133540131 is about 511.1369368365.

Adding to 133540131 its reverse (131045331), we get a palindrome (264585462).

The spelling of 133540131 in words is "one hundred thirty-three million, five hundred forty thousand, one hundred thirty-one".