133321131 has 12 divisors (see below), whose sum is σ = 193383840. Its totient is φ = 88507440.

The previous prime is 133321127. The next prime is 133321147. The reversal of 133321131 is 131123331.

It is a happy number.

It is not a de Polignac number, because 133321131 - 2² = 133321127 is a prime.

It is a super-2 number, since 2×133321131² = 35549047942238322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133325131) 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, 28840 + ... + 33141.

It is an arithmetic number, because the mean of its divisors is an integer number (16115320).

Almost surely, 2^133321131 is an apocalyptic number.

133321131 is a deficient number, since it is larger than the sum of its proper divisors (60062709).

133321131 is a wasteful number, since it uses less digits than its factorization.

133321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62226 (or 62223 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 133321131 is about 11546.4769951704. The cubic root of 133321131 is about 510.8573698484.

Adding to 133321131 its reverse (131123331), we get a palindrome (264444462).

The spelling of 133321131 in words is "one hundred thirty-three million, three hundred twenty-one thousand, one hundred thirty-one".