133108656 has 20 divisors (see below), whose sum is σ = 343864152. Its totient is φ = 44369536.

The previous prime is 133108643. The next prime is 133108663. The reversal of 133108656 is 656801331.

133108656 = 2024² + 2025² + ... + 2055².

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, 1386501 + ... + 1386596.

Almost surely, 2^133108656 is an apocalyptic number.

133108656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133108656 is an abundant number, since it is smaller than the sum of its proper divisors (210755496).

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

133108656 is a wasteful number, since it uses less digits than its factorization.

133108656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773108 (or 2773102 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 133108656 is about 11537.2724679623. The cubic root of 133108656 is about 510.5858396649.

Adding to 133108656 its reverse (656801331), we get a palindrome (789909987).

The spelling of 133108656 in words is "one hundred thirty-three million, one hundred eight thousand, six hundred fifty-six".