133113553 has 4 divisors (see below), whose sum is σ = 140943780. Its totient is φ = 125283328.

The previous prime is 133113551. The next prime is 133113557. The reversal of 133113553 is 355311331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355311331 = 1523 ⋅233297.

It can be written as a sum of positive squares in 2 ways, for example, as 118113424 + 15000129 = 10868^2 + 3873^2 .

It is a cyclic number.

It is not a de Polignac number, because 133113553 - 2¹ = 133113551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133113551) 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 in 3 ways as a sum of consecutive naturals, for example, 3915088 + ... + 3915121.

It is an arithmetic number, because the mean of its divisors is an integer number (35235945).

Almost surely, 2^133113553 is an apocalyptic number.

It is an amenable number.

133113553 is a deficient number, since it is larger than the sum of its proper divisors (7830227).

133113553 is an equidigital number, since it uses as much as digits as its factorization.

133113553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830226.

The product of its digits is 2025, while the sum is 25.

The square root of 133113553 is about 11537.4846912141. The cubic root of 133113553 is about 510.5921009862.

Adding to 133113553 its reverse (355311331), we get a palindrome (488424884).

It can be divided in two parts, 1331 and 13553, that added together give a square (14884 = 122²).

The spelling of 133113553 in words is "one hundred thirty-three million, one hundred thirteen thousand, five hundred fifty-three".