133540031 has 2 divisors, whose sum is σ = 133540032. Its totient is φ = 133540030.

The previous prime is 133540013. The next prime is 133540039. The reversal of 133540031 is 130045331.

It is a happy number.

Together with previous prime (133540013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133540031 - 2¹⁴ = 133523647 is a prime.

It is a super-2 number, since 2×133540031² = 35665879758961922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133539985 and 133540012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133540039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66770015 + 66770016.

It is an arithmetic number, because the mean of its divisors is an integer number (66770016).

Almost surely, 2^133540031 is an apocalyptic number.

133540031 is a deficient number, since it is larger than the sum of its proper divisors (1).

133540031 is an equidigital number, since it uses as much as digits as its factorization.

133540031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 133540031 is about 11555.9521892400. The cubic root of 133540031 is about 511.1368092502.

Adding to 133540031 its reverse (130045331), we get a palindrome (263585362).

The spelling of 133540031 in words is "one hundred thirty-three million, five hundred forty thousand, thirty-one".