231345242 has 4 divisors (see below), whose sum is σ = 347017866. Its totient is φ = 115672620.

The previous prime is 231345241. The next prime is 231345271. The reversal of 231345242 is 242543132.

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

It can be written as a sum of positive squares in only one way, i.e., 161772961 + 69572281 = 12719^2 + 8341^2 .

It is not an unprimeable number, because it can be changed into a prime (231345241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57836309 + ... + 57836312.

Almost surely, 2^231345242 is an apocalyptic number.

231345242 is a deficient number, since it is larger than the sum of its proper divisors (115672624).

231345242 is a wasteful number, since it uses less digits than its factorization.

231345242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115672623.

The product of its digits is 5760, while the sum is 26.

The square root of 231345242 is about 15210.0375410451. The cubic root of 231345242 is about 613.8847676037.

Adding to 231345242 its reverse (242543132), we get a palindrome (473888374).

The spelling of 231345242 in words is "two hundred thirty-one million, three hundred forty-five thousand, two hundred forty-two".