231281242 has 4 divisors (see below), whose sum is σ = 346921866. Its totient is φ = 115640620.

The previous prime is 231281233. The next prime is 231281263. The reversal of 231281242 is 242182132.

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., 229795281 + 1485961 = 15159^2 + 1219^2 .

It is an unprimeable number.

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, 57820309 + ... + 57820312.

Almost surely, 2^231281242 is an apocalyptic number.

231281242 is a deficient number, since it is larger than the sum of its proper divisors (115640624).

231281242 is a wasteful number, since it uses less digits than its factorization.

231281242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115640623.

The product of its digits is 1536, while the sum is 25.

The square root of 231281242 is about 15207.9335216853. The cubic root of 231281242 is about 613.8281534451.

The spelling of 231281242 in words is "two hundred thirty-one million, two hundred eighty-one thousand, two hundred forty-two".