4268151721 has 2 divisors, whose sum is σ = 4268151722. Its totient is φ = 4268151720.

The previous prime is 4268151683. The next prime is 4268151739. The reversal of 4268151721 is 1271518624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4070440000 + 197711721 = 63800^2 + 14061^2 .

It is a cyclic number.

It is not a de Polignac number, because 4268151721 - 2¹¹ = 4268149673 is a prime.

It is a super-2 number, since 2×4268151721² = 36434238226950523682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4268151751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2134075860 + 2134075861.

It is an arithmetic number, because the mean of its divisors is an integer number (2134075861).

Almost surely, 2^4268151721 is an apocalyptic number.

It is an amenable number.

4268151721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4268151721 is an equidigital number, since it uses as much as digits as its factorization.

4268151721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 4268151721 is about 65331.0930644819. The cubic root of 4268151721 is about 1622.1086853340.

The spelling of 4268151721 in words is "four billion, two hundred sixty-eight million, one hundred fifty-one thousand, seven hundred twenty-one".