2400123311 has 4 divisors (see below), whose sum is σ = 2400397824. Its totient is φ = 2399848800.

The previous prime is 2400123269. The next prime is 2400123337. The reversal of 2400123311 is 1133210042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1133210042 = 2 ⋅566605021.

It is a cyclic number.

It is not a de Polignac number, because 2400123311 - 2⁶ = 2400123247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2400123311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400123361) 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, 123695 + ... + 141776.

It is an arithmetic number, because the mean of its divisors is an integer number (600099456).

Almost surely, 2^2400123311 is an apocalyptic number.

2400123311 is a deficient number, since it is larger than the sum of its proper divisors (274513).

2400123311 is an equidigital number, since it uses as much as digits as its factorization.

2400123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274512.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2400123311 is about 48991.0533771218. The cubic root of 2400123311 is about 1338.8888298957. Note that the first 4 decimals are identical.

Adding to 2400123311 its reverse (1133210042), we get a palindrome (3533333353).

The spelling of 2400123311 in words is "two billion, four hundred million, one hundred twenty-three thousand, three hundred eleven".