133231242 has 32 divisors (see below), whose sum is σ = 279189504. Its totient is φ = 42332400.

The previous prime is 133231223. The next prime is 133231271. The reversal of 133231242 is 242132331.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7117 + ... + 17807.

It is an arithmetic number, because the mean of its divisors is an integer number (8724672).

Almost surely, 2^133231242 is an apocalyptic number.

133231242 is an abundant number, since it is smaller than the sum of its proper divisors (145958262).

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

133231242 is a wasteful number, since it uses less digits than its factorization.

133231242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794.

The product of its digits is 864, while the sum is 21.

The square root of 133231242 is about 11542.5838528468. The cubic root of 133231242 is about 510.7425323830.

Adding to 133231242 its reverse (242132331), we get a palindrome (375363573).

The spelling of 133231242 in words is "one hundred thirty-three million, two hundred thirty-one thousand, two hundred forty-two".