133240551 has 8 divisors (see below), whose sum is σ = 177709824. Its totient is φ = 88799160.

The previous prime is 133240537. The next prime is 133240567. The reversal of 133240551 is 155042331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133240551 - 2⁵ = 133240519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133240571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10290 + ... + 19296.

It is an arithmetic number, because the mean of its divisors is an integer number (22213728).

Almost surely, 2^133240551 is an apocalyptic number.

133240551 is a deficient number, since it is larger than the sum of its proper divisors (44469273).

133240551 is an equidigital number, since it uses as much as digits as its factorization.

133240551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13941.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 133240551 is about 11542.9870917367. The cubic root of 133240551 is about 510.7544274697.

Adding to 133240551 its reverse (155042331), we get a palindrome (288282882).

The spelling of 133240551 in words is "one hundred thirty-three million, two hundred forty thousand, five hundred fifty-one".