133620131 has 4 divisors (see below), whose sum is σ = 134640264. Its totient is φ = 132600000.

The previous prime is 133620089. The next prime is 133620143. The reversal of 133620131 is 131026331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133620131 - 2¹⁰ = 133619107 is a prime.

It is a super-2 number, since 2×133620131² = 35708678816914322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133620631) 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, 509870 + ... + 510131.

It is an arithmetic number, because the mean of its divisors is an integer number (33660066).

Almost surely, 2^133620131 is an apocalyptic number.

133620131 is a deficient number, since it is larger than the sum of its proper divisors (1020133).

133620131 is a wasteful number, since it uses less digits than its factorization.

133620131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020132.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 133620131 is about 11559.4174161157. The cubic root of 133620131 is about 511.2389855411.

Adding to 133620131 its reverse (131026331), we get a palindrome (264646462).

The spelling of 133620131 in words is "one hundred thirty-three million, six hundred twenty thousand, one hundred thirty-one".