4021223257 has 2 divisors, whose sum is σ = 4021223258. Its totient is φ = 4021223256.

The previous prime is 4021223209. The next prime is 4021223267. The reversal of 4021223257 is 7523221204.

4021223257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2051727616 + 1969495641 = 45296^2 + 44379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021223257 is a prime.

It is not a weakly prime, because it can be changed into another prime (4021223267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010611628 + 2010611629.

It is an arithmetic number, because the mean of its divisors is an integer number (2010611629).

Almost surely, 2^4021223257 is an apocalyptic number.

It is an amenable number.

4021223257 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021223257 is an equidigital number, since it uses as much as digits as its factorization.

4021223257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 4021223257 is about 63413.1158121094. The cubic root of 4021223257 is about 1590.2035862621.

The spelling of 4021223257 in words is "four billion, twenty-one million, two hundred twenty-three thousand, two hundred fifty-seven".