71023321 has 2 divisors, whose sum is σ = 71023322. Its totient is φ = 71023320.

The previous prime is 71023307. The next prime is 71023327. The reversal of 71023321 is 12332017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 6702921 = 8020^2 + 2589^2 .

It is a cyclic number.

It is not a de Polignac number, because 71023321 - 2²³ = 62634713 is a prime.

It is not a weakly prime, because it can be changed into another prime (71023327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35511660 + 35511661.

It is an arithmetic number, because the mean of its divisors is an integer number (35511661).

Almost surely, 2^71023321 is an apocalyptic number.

It is an amenable number.

71023321 is a deficient number, since it is larger than the sum of its proper divisors (1).

71023321 is an equidigital number, since it uses as much as digits as its factorization.

71023321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 71023321 is about 8427.5335063113. The cubic root of 71023321 is about 414.1271070736.

Adding to 71023321 its reverse (12332017), we get a palindrome (83355338).

The spelling of 71023321 in words is "seventy-one million, twenty-three thousand, three hundred twenty-one".