133630521 has 16 divisors (see below), whose sum is σ = 188818560. Its totient is φ = 83914880.

The previous prime is 133630517. The next prime is 133630537. The reversal of 133630521 is 125036331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133630521 - 2² = 133630517 is a prime.

It is a super-2 number, since 2×133630521² = 35714232285462882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133630491 and 133630500.

It is not an unprimeable number, because it can be changed into a prime (133630121) 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, 15165 + ... + 22298.

It is an arithmetic number, because the mean of its divisors is an integer number (11801160).

Almost surely, 2^133630521 is an apocalyptic number.

It is an amenable number.

133630521 is a deficient number, since it is larger than the sum of its proper divisors (55188039).

133630521 is a wasteful number, since it uses less digits than its factorization.

133630521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37536.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 133630521 is about 11559.8668244924. The cubic root of 133630521 is about 511.2522361278.

Adding to 133630521 its reverse (125036331), we get a palindrome (258666852).

The spelling of 133630521 in words is "one hundred thirty-three million, six hundred thirty thousand, five hundred twenty-one".