133102521 has 12 divisors (see below), whose sum is σ = 199380272. Its totient is φ = 88734852.

The previous prime is 133102517. The next prime is 133102573. The reversal of 133102521 is 125201331.

133102521 is a `hidden beast` number, since 133 + 10 + 2 + 521 = 666.

It is not a de Polignac number, because 133102521 - 2² = 133102517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133102494 and 133102503.

It is not an unprimeable number, because it can be changed into a prime (133102511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273631 + ... + 274116.

Almost surely, 2^133102521 is an apocalyptic number.

It is an amenable number.

133102521 is a deficient number, since it is larger than the sum of its proper divisors (66277751).

133102521 is an frugal number, since it uses more digits than its factorization.

133102521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547762 (or 547750 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 133102521 is about 11537.0065874992. The cubic root of 133102521 is about 510.5779952157.

Adding to 133102521 its reverse (125201331), we get a palindrome (258303852).

The spelling of 133102521 in words is "one hundred thirty-three million, one hundred two thousand, five hundred twenty-one".