243124631 has 2 divisors, whose sum is σ = 243124632. Its totient is φ = 243124630.

The previous prime is 243124613. The next prime is 243124639. The reversal of 243124631 is 136421342.

Together with previous prime (243124613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243124631 - 2²² = 238930327 is a prime.

It is a super-2 number, since 2×243124631² = 118219172397772322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243124631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243124639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121562315 + 121562316.

It is an arithmetic number, because the mean of its divisors is an integer number (121562316).

Almost surely, 2^243124631 is an apocalyptic number.

243124631 is a deficient number, since it is larger than the sum of its proper divisors (1).

243124631 is an equidigital number, since it uses as much as digits as its factorization.

243124631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

The square root of 243124631 is about 15592.4542968707. The cubic root of 243124631 is about 624.1318130139.

Adding to 243124631 its reverse (136421342), we get a palindrome (379545973).

The spelling of 243124631 in words is "two hundred forty-three million, one hundred twenty-four thousand, six hundred thirty-one".