133041531 has 16 divisors (see below), whose sum is σ = 209721600. Its totient is φ = 73401888.

The previous prime is 133041497. The next prime is 133041533. The reversal of 133041531 is 135140331.

It is not a de Polignac number, because 133041531 - 2¹¹ = 133039483 is a prime.

It is a super-2 number, since 2×133041531² = 35400097941647922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 133041498 and 133041507.

It is not an unprimeable number, because it can be changed into a prime (133041533) 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, 108621 + ... + 109838.

It is an arithmetic number, because the mean of its divisors is an integer number (13107600).

Almost surely, 2^133041531 is an apocalyptic number.

133041531 is a deficient number, since it is larger than the sum of its proper divisors (76680069).

133041531 is a wasteful number, since it uses less digits than its factorization.

133041531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218498.

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

The square root of 133041531 is about 11534.3630513349. The cubic root of 133041531 is about 510.4999979215.

Adding to 133041531 its reverse (135140331), we get a palindrome (268181862).

The spelling of 133041531 in words is "one hundred thirty-three million, forty-one thousand, five hundred thirty-one".