4385531261 has 2 divisors, whose sum is σ = 4385531262. Its totient is φ = 4385531260.

The previous prime is 4385531237. The next prime is 4385531299. The reversal of 4385531261 is 1621355834.

It is a happy number.

It is an a-pointer prime, because the next prime (4385531299) can be obtained adding 4385531261 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3263951161 + 1121580100 = 57131^2 + 33490^2 .

It is a cyclic number.

It is not a de Polignac number, because 4385531261 - 2²⁶ = 4318422397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4385531231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2192765630 + 2192765631.

It is an arithmetic number, because the mean of its divisors is an integer number (2192765631).

Almost surely, 2^4385531261 is an apocalyptic number.

It is an amenable number.

4385531261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4385531261 is an equidigital number, since it uses as much as digits as its factorization.

4385531261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The square root of 4385531261 is about 66223.3437769492. The cubic root of 4385531261 is about 1636.8444255383.

The spelling of 4385531261 in words is "four billion, three hundred eighty-five million, five hundred thirty-one thousand, two hundred sixty-one".