133113555 has 12 divisors (see below), whose sum is σ = 230730240. Its totient is φ = 70993872.

The previous prime is 133113551. The next prime is 133113557. The reversal of 133113555 is 555311331.

It is not a de Polignac number, because 133113555 - 2² = 133113551 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (133113551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1478995 + ... + 1479084.

It is an arithmetic number, because the mean of its divisors is an integer number (19227520).

Almost surely, 2^133113555 is an apocalyptic number.

133113555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133113555 is a deficient number, since it is larger than the sum of its proper divisors (97616685).

133113555 is a wasteful number, since it uses less digits than its factorization.

133113555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958090 (or 2958087 counting only the distinct ones).

The product of its digits is 3375, while the sum is 27.

The square root of 133113555 is about 11537.4847778881. The cubic root of 133113555 is about 510.5921035434.

Adding to 133113555 its reverse (555311331), we get a palindrome (688424886).

The spelling of 133113555 in words is "one hundred thirty-three million, one hundred thirteen thousand, five hundred fifty-five".