231273442 has 8 divisors (see below), whose sum is σ = 350808300. Its totient is φ = 114337344.

The previous prime is 231273437. The next prime is 231273443. The reversal of 231273442 is 244372132.

It can be written as a sum of positive squares in 2 ways, for example, as 182007081 + 49266361 = 13491^2 + 7019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231273442.

It is not an unprimeable number, because it can be changed into a prime (231273443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649467 + ... + 649822.

Almost surely, 2^231273442 is an apocalyptic number.

231273442 is a deficient number, since it is larger than the sum of its proper divisors (119534858).

231273442 is a wasteful number, since it uses less digits than its factorization.

231273442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299380.

The product of its digits is 8064, while the sum is 28.

The square root of 231273442 is about 15207.6770744253. The cubic root of 231273442 is about 613.8212528805.

It can be divided in two parts, 23127 and 3442, that added together give a square (26569 = 163²).

The spelling of 231273442 in words is "two hundred thirty-one million, two hundred seventy-three thousand, four hundred forty-two".