133543457 has 8 divisors (see below), whose sum is σ = 142877760. Its totient is φ = 124439760.

The previous prime is 133543453. The next prime is 133543469. The reversal of 133543457 is 754345331.

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 133543457 - 2² = 133543453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133543453) 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, 56453 + ... + 58770.

It is an arithmetic number, because the mean of its divisors is an integer number (17859720).

Almost surely, 2^133543457 is an apocalyptic number.

It is an amenable number.

133543457 is a deficient number, since it is larger than the sum of its proper divisors (9334303).

133543457 is a wasteful number, since it uses less digits than its factorization.

133543457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115303.

The product of its digits is 75600, while the sum is 35.

The square root of 133543457 is about 11556.1004235858. The cubic root of 133543457 is about 511.1411803233.

Adding to 133543457 its reverse (754345331), we get a palindrome (887888788).

The spelling of 133543457 in words is "one hundred thirty-three million, five hundred forty-three thousand, four hundred fifty-seven".