243130653 has 10 divisors (see below), whose sum is σ = 363195294. Its totient is φ = 162087048.

The previous prime is 243130633. The next prime is 243130673. The reversal of 243130653 is 356031342.

It is a happy number.

243130653 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 3 + 0 + 653 = 666.

It is an interprime number because it is at equal distance from previous prime (243130633) and next prime (243130673).

It can be written as a sum of positive squares in only one way, i.e., 129004164 + 114126489 = 11358^2 + 10683^2 .

It is not a de Polignac number, because 243130653 - 2¹⁰ = 243129629 is a prime.

It is a super-2 number, since 2×243130653² = 118225028856412818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243130633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1500726 + ... + 1500887.

Almost surely, 2^243130653 is an apocalyptic number.

It is an amenable number.

243130653 is a deficient number, since it is larger than the sum of its proper divisors (120064641).

243130653 is an equidigital number, since it uses as much as digits as its factorization.

243130653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001625 (or 3001616 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 243130653 is about 15592.6474019007. The cubic root of 243130653 is about 624.1369660510.

Adding to 243130653 its reverse (356031342), we get a palindrome (599161995).

The spelling of 243130653 in words is "two hundred forty-three million, one hundred thirty thousand, six hundred fifty-three".