1240231331 has 2 divisors, whose sum is σ = 1240231332. Its totient is φ = 1240231330.

The previous prime is 1240231319. The next prime is 1240231361. The reversal of 1240231331 is 1331320421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240231331 - 2¹⁸ = 1239969187 is a prime.

It is a super-2 number, since 2×1240231331² = 3076347508788063122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1240231301) 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 as a sum of consecutive naturals, namely, 620115665 + 620115666.

It is an arithmetic number, because the mean of its divisors is an integer number (620115666).

Almost surely, 2^1240231331 is an apocalyptic number.

1240231331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240231331 is an equidigital number, since it uses as much as digits as its factorization.

1240231331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1240231331 is about 35216.9182496141. The cubic root of 1240231331 is about 1074.4038752943.

Adding to 1240231331 its reverse (1331320421), we get a palindrome (2571551752).

The spelling of 1240231331 in words is "one billion, two hundred forty million, two hundred thirty-one thousand, three hundred thirty-one".