133400552 has 32 divisors (see below), whose sum is σ = 267382080. Its totient is φ = 62240640.

The previous prime is 133400549. The next prime is 133400569. The reversal of 133400552 is 255004331.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1298 + ... + 16385.

It is an arithmetic number, because the mean of its divisors is an integer number (8355690).

Almost surely, 2^133400552 is an apocalyptic number.

It is an amenable number.

133400552 is an abundant number, since it is smaller than the sum of its proper divisors (133981528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133400552 is a wasteful number, since it uses less digits than its factorization.

133400552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17753 (or 17749 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 133400552 is about 11549.9156706878. The cubic root of 133400552 is about 510.9587910034.

Adding to 133400552 its reverse (255004331), we get a palindrome (388404883).

The spelling of 133400552 in words is "one hundred thirty-three million, four hundred thousand, five hundred fifty-two".