133240554 has 12 divisors (see below), whose sum is σ = 288687906. Its totient is φ = 44413512.

The previous prime is 133240537. The next prime is 133240567. The reversal of 133240554 is 455042331.

It can be written as a sum of positive squares in only one way, i.e., 73564929 + 59675625 = 8577^2 + 7725^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3701109 + ... + 3701144.

Almost surely, 2^133240554 is an apocalyptic number.

133240554 is an abundant number, since it is smaller than the sum of its proper divisors (155447352).

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

133240554 is a wasteful number, since it uses less digits than its factorization.

133240554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7402261 (or 7402258 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 133240554 is about 11542.9872216857. The cubic root of 133240554 is about 510.7544313030.

Adding to 133240554 its reverse (455042331), we get a palindrome (588282885).

The spelling of 133240554 in words is "one hundred thirty-three million, two hundred forty thousand, five hundred fifty-four".