133525137 has 4 divisors (see below), whose sum is σ = 178033520. Its totient is φ = 89016756.

The previous prime is 133525127. The next prime is 133525163. The reversal of 133525137 is 731525331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133525137 - 2¹⁵ = 133492369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133525127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22254187 + ... + 22254192.

It is an arithmetic number, because the mean of its divisors is an integer number (44508380).

Almost surely, 2^133525137 is an apocalyptic number.

It is an amenable number.

133525137 is a deficient number, since it is larger than the sum of its proper divisors (44508383).

133525137 is an equidigital number, since it uses as much as digits as its factorization.

133525137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44508382.

The product of its digits is 9450, while the sum is 30.

The square root of 133525137 is about 11555.3077414667. The cubic root of 133525137 is about 511.1178058232.

The spelling of 133525137 in words is "one hundred thirty-three million, five hundred twenty-five thousand, one hundred thirty-seven".