133311457 has 2 divisors, whose sum is σ = 133311458. Its totient is φ = 133311456.

The previous prime is 133311403. The next prime is 133311461. The reversal of 133311457 is 754113331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123676641 + 9634816 = 11121^2 + 3104^2 .

It is a cyclic number.

It is not a de Polignac number, because 133311457 - 2⁷ = 133311329 is a prime.

It is not a weakly prime, because it can be changed into another prime (133311557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66655728 + 66655729.

It is an arithmetic number, because the mean of its divisors is an integer number (66655729).

Almost surely, 2^133311457 is an apocalyptic number.

It is an amenable number.

133311457 is a deficient number, since it is larger than the sum of its proper divisors (1).

133311457 is an equidigital number, since it uses as much as digits as its factorization.

133311457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 133311457 is about 11546.0580719135. The cubic root of 133311457 is about 510.8450133332.

Adding to 133311457 its reverse (754113331), we get a palindrome (887424788).

The spelling of 133311457 in words is "one hundred thirty-three million, three hundred eleven thousand, four hundred fifty-seven".