4231421540 has 12 divisors (see below), whose sum is σ = 8885985276. Its totient is φ = 1692568608.

The previous prime is 4231421479. The next prime is 4231421549. The reversal of 4231421540 is 451241324.

It can be written as a sum of positive squares in 2 ways, for example, as 3122797924 + 1108623616 = 55882^2 + 33296^2 .

It is not an unprimeable number, because it can be changed into a prime (4231421549) 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, 105785519 + ... + 105785558.

It is an arithmetic number, because the mean of its divisors is an integer number (740498773).

Almost surely, 2^4231421540 is an apocalyptic number.

It is an amenable number.

4231421540 is an abundant number, since it is smaller than the sum of its proper divisors (4654563736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4231421540 is a wasteful number, since it uses less digits than its factorization.

4231421540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211571086 (or 211571084 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4231421540 is about 65049.3777064777. The cubic root of 4231421540 is about 1617.4421785837.

Adding to 4231421540 its reverse (451241324), we get a palindrome (4682662864).

The spelling of 4231421540 in words is "four billion, two hundred thirty-one million, four hundred twenty-one thousand, five hundred forty".