1223540211 has 8 divisors (see below), whose sum is σ = 1636702144. Its totient is φ = 813035880.

The previous prime is 1223540183. The next prime is 1223540221. The reversal of 1223540211 is 1120453221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1223540211 - 2⁵ = 1223540179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223540221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663325 + ... + 665166.

It is an arithmetic number, because the mean of its divisors is an integer number (204587768).

Almost surely, 2^1223540211 is an apocalyptic number.

1223540211 is a deficient number, since it is larger than the sum of its proper divisors (413161933).

1223540211 is a wasteful number, since it uses less digits than its factorization.

1223540211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328801.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1223540211 is about 34979.1396549429. The cubic root of 1223540211 is about 1069.5622895970.

Adding to 1223540211 its reverse (1120453221), we get a palindrome (2343993432).

The spelling of 1223540211 in words is "one billion, two hundred twenty-three million, five hundred forty thousand, two hundred eleven".