133453531 has 2 divisors, whose sum is σ = 133453532. Its totient is φ = 133453530.

The previous prime is 133453501. The next prime is 133453577. The reversal of 133453531 is 135354331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133453531 - 2²³ = 125064923 is a prime.

It is a super-2 number, since 2×133453531² = 35619689872735922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133453531.

It is not a weakly prime, because it can be changed into another prime (133453501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66726765 + 66726766.

It is an arithmetic number, because the mean of its divisors is an integer number (66726766).

Almost surely, 2^133453531 is an apocalyptic number.

133453531 is a deficient number, since it is larger than the sum of its proper divisors (1).

133453531 is an equidigital number, since it uses as much as digits as its factorization.

133453531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 28.

The square root of 133453531 is about 11552.2089229723. The cubic root of 133453531 is about 511.0264231648.

The spelling of 133453531 in words is "one hundred thirty-three million, four hundred fifty-three thousand, five hundred thirty-one".