1240232311 has 4 divisors (see below), whose sum is σ = 1240559712. Its totient is φ = 1239904912.

The previous prime is 1240232303. The next prime is 1240232339. The reversal of 1240232311 is 1132320421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1132320421 = 1151 ⋅983771.

It is a cyclic number.

It is not a de Polignac number, because 1240232311 - 2³ = 1240232303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240239311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157951 + ... + 165616.

It is an arithmetic number, because the mean of its divisors is an integer number (310139928).

Almost surely, 2^1240232311 is an apocalyptic number.

1240232311 is a deficient number, since it is larger than the sum of its proper divisors (327401).

1240232311 is an equidigital number, since it uses as much as digits as its factorization.

1240232311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327400.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1240232311 is about 35216.9321633785. The cubic root of 1240232311 is about 1074.4041582833.

Adding to 1240232311 its reverse (1132320421), we get a palindrome (2372552732).

The spelling of 1240232311 in words is "one billion, two hundred forty million, two hundred thirty-two thousand, three hundred eleven".