133455557 has 2 divisors, whose sum is σ = 133455558. Its totient is φ = 133455556.

The previous prime is 133455547. The next prime is 133455571. The reversal of 133455557 is 755554331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130736356 + 2719201 = 11434^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 133455557 - 2⁴ = 133455541 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 133455557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133455547) 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 as a sum of consecutive naturals, namely, 66727778 + 66727779.

It is an arithmetic number, because the mean of its divisors is an integer number (66727779).

Almost surely, 2^133455557 is an apocalyptic number.

It is an amenable number.

133455557 is a deficient number, since it is larger than the sum of its proper divisors (1).

133455557 is an equidigital number, since it uses as much as digits as its factorization.

133455557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157500, while the sum is 38.

The square root of 133455557 is about 11552.2966114968. The cubic root of 133455557 is about 511.0290091693.

The spelling of 133455557 in words is "one hundred thirty-three million, four hundred fifty-five thousand, five hundred fifty-seven".