23144400211 has 4 divisors (see below), whose sum is σ = 23223391632. Its totient is φ = 23065408792.

The previous prime is 23144400199. The next prime is 23144400221. The reversal of 23144400211 is 11200444132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23144400211 - 2⁵ = 23144400179 is a prime.

It is a super-2 number, since 2×23144400211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23144400221) 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, 39495271 + ... + 39495856.

It is an arithmetic number, because the mean of its divisors is an integer number (5805847908).

Almost surely, 2^23144400211 is an apocalyptic number.

23144400211 is a deficient number, since it is larger than the sum of its proper divisors (78991421).

23144400211 is an equidigital number, since it uses as much as digits as its factorization.

23144400211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78991420.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 23144400211 its reverse (11200444132), we get a palindrome (34344844343).

The spelling of 23144400211 in words is "twenty-three billion, one hundred forty-four million, four hundred thousand, two hundred eleven".