133543240 has 16 divisors (see below), whose sum is σ = 300472380. Its totient is φ = 53417280.

The previous prime is 133543237. The next prime is 133543271. The reversal of 133543240 is 42345331.

It can be written as a sum of positive squares in 2 ways, for example, as 113167044 + 20376196 = 10638^2 + 4514^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669251 + ... + 1669330.

Almost surely, 2^133543240 is an apocalyptic number.

133543240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133543240 is an abundant number, since it is smaller than the sum of its proper divisors (166929140).

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

133543240 is a wasteful number, since it uses less digits than its factorization.

133543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338592 (or 3338588 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 133543240 is about 11556.0910346016. The cubic root of 133543240 is about 511.1409034654.

Adding to 133543240 its reverse (42345331), we get a palindrome (175888571).

The spelling of 133543240 in words is "one hundred thirty-three million, five hundred forty-three thousand, two hundred forty".