133040540 has 12 divisors (see below), whose sum is σ = 279385176. Its totient is φ = 53216208.

The previous prime is 133040519. The next prime is 133040543. The reversal of 133040540 is 45040331.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6652027 = 133040540 / (1 + 3 + 3 + 0 + 4 + 0 + 5 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133040543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3325994 + ... + 3326033.

It is an arithmetic number, because the mean of its divisors is an integer number (23282098).

Almost surely, 2^133040540 is an apocalyptic number.

133040540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133040540 is an abundant number, since it is smaller than the sum of its proper divisors (146344636).

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

133040540 is a wasteful number, since it uses less digits than its factorization.

133040540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6652036 (or 6652034 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 133040540 is about 11534.3200926626. The cubic root of 133040540 is about 510.4987303806.

Adding to 133040540 its reverse (45040331), we get a palindrome (178080871).

The spelling of 133040540 in words is "one hundred thirty-three million, forty thousand, five hundred forty".