133528857 has 16 divisors (see below), whose sum is σ = 221970432. Its totient is φ = 69365520.

The previous prime is 133528853. The next prime is 133528867. The reversal of 133528857 is 758825331.

It is not a de Polignac number, because 133528857 - 2² = 133528853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133528853) 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, 288793 + ... + 289254.

It is an arithmetic number, because the mean of its divisors is an integer number (13873152).

Almost surely, 2^133528857 is an apocalyptic number.

It is an amenable number.

133528857 is a deficient number, since it is larger than the sum of its proper divisors (88441575).

133528857 is a wasteful number, since it uses less digits than its factorization.

133528857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578068.

The product of its digits is 201600, while the sum is 42.

The square root of 133528857 is about 11555.4687053360. The cubic root of 133528857 is about 511.1225523466.

The spelling of 133528857 in words is "one hundred thirty-three million, five hundred twenty-eight thousand, eight hundred fifty-seven".