133242031 has 4 divisors (see below), whose sum is σ = 143491432. Its totient is φ = 122992632.

The previous prime is 133242023. The next prime is 133242077. The reversal of 133242031 is 130242331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133242031 - 2³ = 133242023 is a prime.

It is a super-2 number, since 2×133242031² = 35506877650009922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133242631) 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 3 ways as a sum of consecutive naturals, for example, 5124681 + ... + 5124706.

It is an arithmetic number, because the mean of its divisors is an integer number (35872858).

Almost surely, 2^133242031 is an apocalyptic number.

133242031 is a deficient number, since it is larger than the sum of its proper divisors (10249401).

133242031 is a wasteful number, since it uses less digits than its factorization.

133242031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249400.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 133242031 is about 11543.0511997478. The cubic root of 133242031 is about 510.7563185700.

Adding to 133242031 its reverse (130242331), we get a palindrome (263484362).

The spelling of 133242031 in words is "one hundred thirty-three million, two hundred forty-two thousand, thirty-one".