4340021557 has 2 divisors, whose sum is σ = 4340021558. Its totient is φ = 4340021556.

The previous prime is 4340021531. The next prime is 4340021563. The reversal of 4340021557 is 7551200434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3803682276 + 536339281 = 61674^2 + 23159^2 .

It is a cyclic number.

It is not a de Polignac number, because 4340021557 - 2⁷ = 4340021429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4340021507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2170010778 + 2170010779.

It is an arithmetic number, because the mean of its divisors is an integer number (2170010779).

Almost surely, 2^4340021557 is an apocalyptic number.

It is an amenable number.

4340021557 is a deficient number, since it is larger than the sum of its proper divisors (1).

4340021557 is an equidigital number, since it uses as much as digits as its factorization.

4340021557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 4340021557 is about 65878.8399791617. The cubic root of 4340021557 is about 1631.1627516016.

The spelling of 4340021557 in words is "four billion, three hundred forty million, twenty-one thousand, five hundred fifty-seven".