133144540 has 24 divisors (see below), whose sum is σ = 280410480. Its totient is φ = 53104128.

The previous prime is 133144513. The next prime is 133144541. The reversal of 133144540 is 45441331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133144541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2370 + ... + 16489.

It is an arithmetic number, because the mean of its divisors is an integer number (11683770).

Almost surely, 2^133144540 is an apocalyptic number.

133144540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133144540 is an abundant number, since it is smaller than the sum of its proper divisors (147265940).

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

133144540 is a wasteful number, since it uses less digits than its factorization.

133144540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19221 (or 19219 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 133144540 is about 11538.8274967607. The cubic root of 133144540 is about 510.6317175130.

Adding to 133144540 its reverse (45441331), we get a palindrome (178585871).

The spelling of 133144540 in words is "one hundred thirty-three million, one hundred forty-four thousand, five hundred forty".