5321438561 has 2 divisors, whose sum is σ = 5321438562. Its totient is φ = 5321438560.

The previous prime is 5321438489. The next prime is 5321438599. The reversal of 5321438561 is 1658341235.

It is a happy number.

It is an a-pointer prime, because the next prime (5321438599) can be obtained adding 5321438561 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4585998400 + 735440161 = 67720^2 + 27119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5321438561 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5321438261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2660719280 + 2660719281.

It is an arithmetic number, because the mean of its divisors is an integer number (2660719281).

Almost surely, 2^5321438561 is an apocalyptic number.

It is an amenable number.

5321438561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5321438561 is an equidigital number, since it uses as much as digits as its factorization.

5321438561 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 5321438561 is about 72948.1909371302. The cubic root of 5321438561 is about 1745.8610825638.

Adding to 5321438561 its reverse (1658341235), we get a palindrome (6979779796).

The spelling of 5321438561 in words is "five billion, three hundred twenty-one million, four hundred thirty-eight thousand, five hundred sixty-one".