231000133242 has 32 divisors (see below), whose sum is σ = 482120968320. Its totient is φ = 73647062720.

The previous prime is 231000133241. The next prime is 231000133253. The reversal of 231000133242 is 242331000132.

It is a super-2 number, since 2×231000133242² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231000133241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2248984 + ... + 2349452.

It is an arithmetic number, because the mean of its divisors is an integer number (15066280260).

Almost surely, 2^231000133242 is an apocalyptic number.

231000133242 is an abundant number, since it is smaller than the sum of its proper divisors (251120835078).

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

231000133242 is a wasteful number, since it uses less digits than its factorization.

231000133242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117158.

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

Adding to 231000133242 its reverse (242331000132), we get a palindrome (473331133374).

The spelling of 231000133242 in words is "two hundred thirty-one billion, one hundred thirty-three thousand, two hundred forty-two".