4231421549 has 2 divisors, whose sum is σ = 4231421550. Its totient is φ = 4231421548.

The previous prime is 4231421479. The next prime is 4231421599. The reversal of 4231421549 is 9451241324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3955529449 + 275892100 = 62893^2 + 16610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4231421549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4231421599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2115710774 + 2115710775.

It is an arithmetic number, because the mean of its divisors is an integer number (2115710775).

Almost surely, 2^4231421549 is an apocalyptic number.

It is an amenable number.

4231421549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4231421549 is an equidigital number, since it uses as much as digits as its factorization.

4231421549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 4231421549 is about 65049.3777756559. The cubic root of 4231421549 is about 1617.4421797305.

The spelling of 4231421549 in words is "four billion, two hundred thirty-one million, four hundred twenty-one thousand, five hundred forty-nine".