133231455 has 48 divisors (see below), whose sum is σ = 264775680. Its totient is φ = 60709824.

The previous prime is 133231411. The next prime is 133231457. The reversal of 133231455 is 554132331.

It is not a de Polignac number, because 133231455 - 2⁶ = 133231391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150444 + ... + 151326.

It is an arithmetic number, because the mean of its divisors is an integer number (5516160).

Almost surely, 2^133231455 is an apocalyptic number.

133231455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133231455 is a deficient number, since it is larger than the sum of its proper divisors (131544225).

133231455 is a wasteful number, since it uses less digits than its factorization.

133231455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1377 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 133231455 is about 11542.5930795467. The cubic root of 133231455 is about 510.7428045617.

Adding to 133231455 its reverse (554132331), we get a palindrome (687363786).

The spelling of 133231455 in words is "one hundred thirty-three million, two hundred thirty-one thousand, four hundred fifty-five".