133443157 has 2 divisors, whose sum is σ = 133443158. Its totient is φ = 133443156.

The previous prime is 133443143. The next prime is 133443179. The reversal of 133443157 is 751344331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71757841 + 61685316 = 8471^2 + 7854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133443157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133441157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66721578 + 66721579.

It is an arithmetic number, because the mean of its divisors is an integer number (66721579).

Almost surely, 2^133443157 is an apocalyptic number.

It is an amenable number.

133443157 is a deficient number, since it is larger than the sum of its proper divisors (1).

133443157 is an equidigital number, since it uses as much as digits as its factorization.

133443157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 133443157 is about 11551.7599092086. The cubic root of 133443157 is about 511.0131812884.

Adding to 133443157 its reverse (751344331), we get a palindrome (884787488).

The spelling of 133443157 in words is "one hundred thirty-three million, four hundred forty-three thousand, one hundred fifty-seven".