1240430231 has 2 divisors, whose sum is σ = 1240430232. Its totient is φ = 1240430230.

The previous prime is 1240430221. The next prime is 1240430263. The reversal of 1240430231 is 1320340421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240430231 - 2¹⁰ = 1240429207 is a prime.

It is a super-2 number, since 2×1240430231² = 3077334315957426722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240430221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620215115 + 620215116.

It is an arithmetic number, because the mean of its divisors is an integer number (620215116).

Almost surely, 2^1240430231 is an apocalyptic number.

1240430231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240430231 is an equidigital number, since it uses as much as digits as its factorization.

1240430231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1240430231 is about 35219.7420632236. The cubic root of 1240430231 is about 1074.4613074584.

Adding to 1240430231 its reverse (1320340421), we get a palindrome (2560770652).

The spelling of 1240430231 in words is "one billion, two hundred forty million, four hundred thirty thousand, two hundred thirty-one".