133231013 has 2 divisors, whose sum is σ = 133231014. Its totient is φ = 133231012.

The previous prime is 133231009. The next prime is 133231073. The reversal of 133231013 is 310132331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116273089 + 16957924 = 10783^2 + 4118^2 .

It is a cyclic number.

It is not a de Polignac number, because 133231013 - 2² = 133231009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133230982 and 133231000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133231073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66615506 + 66615507.

It is an arithmetic number, because the mean of its divisors is an integer number (66615507).

Almost surely, 2^133231013 is an apocalyptic number.

It is an amenable number.

133231013 is a deficient number, since it is larger than the sum of its proper divisors (1).

133231013 is an equidigital number, since it uses as much as digits as its factorization.

133231013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133231013 is about 11542.5739330532. The cubic root of 133231013 is about 510.7422397587.

Adding to 133231013 its reverse (310132331), we get a palindrome (443363344).

The spelling of 133231013 in words is "one hundred thirty-three million, two hundred thirty-one thousand, thirteen".