2154223311 has 4 divisors (see below), whose sum is σ = 2872297752. Its totient is φ = 1436148872.

The previous prime is 2154223307. The next prime is 2154223321. The reversal of 2154223311 is 1133224512.

2154223311 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 2154223311 - 2² = 2154223307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154223321) 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, 359037216 + ... + 359037221.

It is an arithmetic number, because the mean of its divisors is an integer number (718074438).

Almost surely, 2^2154223311 is an apocalyptic number.

2154223311 is a deficient number, since it is larger than the sum of its proper divisors (718074441).

2154223311 is an equidigital number, since it uses as much as digits as its factorization.

2154223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718074440.

The product of its digits is 1440, while the sum is 24.

The square root of 2154223311 is about 46413.6112686785. The cubic root of 2154223311 is about 1291.5074241666.

Adding to 2154223311 its reverse (1133224512), we get a palindrome (3287447823).

The spelling of 2154223311 in words is "two billion, one hundred fifty-four million, two hundred twenty-three thousand, three hundred eleven".