243226631 has 2 divisors, whose sum is σ = 243226632. Its totient is φ = 243226630.

The previous prime is 243226601. The next prime is 243226673. The reversal of 243226631 is 136622342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243226631 - 2²² = 239032327 is a prime.

It is a super-2 number, since 2×243226631² = 118318388055220322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243226594 and 243226603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243226601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121613315 + 121613316.

It is an arithmetic number, because the mean of its divisors is an integer number (121613316).

Almost surely, 2^243226631 is an apocalyptic number.

243226631 is a deficient number, since it is larger than the sum of its proper divisors (1).

243226631 is an equidigital number, since it uses as much as digits as its factorization.

243226631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 243226631 is about 15595.7247667430. The cubic root of 243226631 is about 624.2190831299.

Adding to 243226631 its reverse (136622342), we get a palindrome (379848973).

The spelling of 243226631 in words is "two hundred forty-three million, two hundred twenty-six thousand, six hundred thirty-one".