4231220045 has 24 divisors (see below), whose sum is σ = 5512368456. Its totient is φ = 3116475648.

The previous prime is 4231220023. The next prime is 4231220053. The reversal of 4231220045 is 5400221324.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 2204959849 + 2026260196 = 46957^2 + 45014^2 .

It is not a de Polignac number, because 4231220045 - 2²⁰ = 4230171469 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 4231220045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329159 + ... + 341771.

It is an arithmetic number, because the mean of its divisors is an integer number (229682019).

Almost surely, 2^4231220045 is an apocalyptic number.

It is an amenable number.

4231220045 is a deficient number, since it is larger than the sum of its proper divisors (1281148411).

4231220045 is a wasteful number, since it uses less digits than its factorization.

4231220045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13041 (or 13028 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 4231220045 is about 65047.8289030464. The cubic root of 4231220045 is about 1617.4165046519.

Adding to 4231220045 its reverse (5400221324), we get a palindrome (9631441369).

The spelling of 4231220045 in words is "four billion, two hundred thirty-one million, two hundred twenty thousand, forty-five".