243401427 has 24 divisors (see below), whose sum is σ = 372906144. Its totient is φ = 152457984.

The previous prime is 243401413. The next prime is 243401443. The reversal of 243401427 is 724104342.

It is not a de Polignac number, because 243401427 - 2⁶ = 243401363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243401427.

It is not an unprimeable number, because it can be changed into a prime (243401497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124953 + ... + 126885.

It is an arithmetic number, because the mean of its divisors is an integer number (15537756).

Almost surely, 2^243401427 is an apocalyptic number.

243401427 is a deficient number, since it is larger than the sum of its proper divisors (129504717).

243401427 is a wasteful number, since it uses less digits than its factorization.

243401427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779 (or 2776 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 243401427 is about 15601.3277319592. The cubic root of 243401427 is about 624.3685800156.

Adding to 243401427 its reverse (724104342), we get a palindrome (967505769).

The spelling of 243401427 in words is "two hundred forty-three million, four hundred one thousand, four hundred twenty-seven".