4135221243 has 24 divisors (see below), whose sum is σ = 6012115200. Its totient is φ = 2738845440.

The previous prime is 4135221241. The next prime is 4135221247. The reversal of 4135221243 is 3421225314.

4135221243 is a `hidden beast` number, since 4 + 13 + 522 + 124 + 3 = 666.

It is not a de Polignac number, because 4135221243 - 2¹ = 4135221241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4135221241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2661955 + ... + 2663507.

It is an arithmetic number, because the mean of its divisors is an integer number (250504800).

Almost surely, 2^4135221243 is an apocalyptic number.

4135221243 is a deficient number, since it is larger than the sum of its proper divisors (1876893957).

4135221243 is a wasteful number, since it uses less digits than its factorization.

4135221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3296 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 4135221243 is about 64305.6859305614. The cubic root of 4135221243 is about 1605.0907183707.

Adding to 4135221243 its reverse (3421225314), we get a palindrome (7556446557).

The spelling of 4135221243 in words is "four billion, one hundred thirty-five million, two hundred twenty-one thousand, two hundred forty-three".