243130651 has 4 divisors (see below), whose sum is σ = 257432472. Its totient is φ = 228828832.

The previous prime is 243130633. The next prime is 243130673. The reversal of 243130651 is 156031342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243130651 - 2⁵ = 243130619 is a prime.

It is a super-2 number, since 2×243130651² = 118225026911367602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243130691) 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 3 ways as a sum of consecutive naturals, for example, 7150885 + ... + 7150918.

It is an arithmetic number, because the mean of its divisors is an integer number (64358118).

Almost surely, 2^243130651 is an apocalyptic number.

243130651 is a deficient number, since it is larger than the sum of its proper divisors (14301821).

243130651 is a wasteful number, since it uses less digits than its factorization.

243130651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14301820.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 243130651 is about 15592.6473377679. The cubic root of 243130651 is about 624.1369643397.

Adding to 243130651 its reverse (156031342), we get a palindrome (399161993).

The spelling of 243130651 in words is "two hundred forty-three million, one hundred thirty thousand, six hundred fifty-one".