243126053 has 8 divisors (see below), whose sum is σ = 255634680. Its totient is φ = 230892480.

The previous prime is 243126043. The next prime is 243126067. The reversal of 243126053 is 350621342.

It can be written as a sum of positive squares in 4 ways, for example, as 26388769 + 216737284 = 5137^2 + 14722^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243126053 is a prime.

It is a super-2 number, since 2×243126053² = 118220555294717618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243126043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66950 + ... + 70487.

It is an arithmetic number, because the mean of its divisors is an integer number (31954335).

Almost surely, 2^243126053 is an apocalyptic number.

It is an amenable number.

243126053 is a deficient number, since it is larger than the sum of its proper divisors (12508627).

243126053 is a wasteful number, since it uses less digits than its factorization.

243126053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137527.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 243126053 is about 15592.4998957832. The cubic root of 243126053 is about 624.1330298298.

Adding to 243126053 its reverse (350621342), we get a palindrome (593747395).

The spelling of 243126053 in words is "two hundred forty-three million, one hundred twenty-six thousand, fifty-three".