133525251 has 12 divisors (see below), whose sum is σ = 199520880. Its totient is φ = 85947120.

The previous prime is 133525213. The next prime is 133525289. The reversal of 133525251 is 152525331.

It is a happy number.

133525251 is a `hidden beast` number, since 133 + 5 + 2 + 525 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (133525213) and next prime (133525289).

It is not a de Polignac number, because 133525251 - 2⁹ = 133524739 is a prime.

It is a super-2 number, since 2×133525251² = 35657985309226002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133525211) 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 11 ways as a sum of consecutive naturals, for example, 255535 + ... + 256056.

It is an arithmetic number, because the mean of its divisors is an integer number (16626740).

Almost surely, 2^133525251 is an apocalyptic number.

133525251 is a deficient number, since it is larger than the sum of its proper divisors (65995629).

133525251 is a wasteful number, since it uses less digits than its factorization.

133525251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511626 (or 511623 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 133525251 is about 11555.3126742637. The cubic root of 133525251 is about 511.1179512825.

The spelling of 133525251 in words is "one hundred thirty-three million, five hundred twenty-five thousand, two hundred fifty-one".