71233321 has 2 divisors, whose sum is σ = 71233322. Its totient is φ = 71233320.

The previous prime is 71233307. The next prime is 71233333. The reversal of 71233321 is 12333217.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59598400 + 11634921 = 7720^2 + 3411^2 .

It is a cyclic number.

It is not a de Polignac number, because 71233321 - 2⁵ = 71233289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71233292 and 71233301.

It is not a weakly prime, because it can be changed into another prime (71233301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35616660 + 35616661.

It is an arithmetic number, because the mean of its divisors is an integer number (35616661).

Almost surely, 2^71233321 is an apocalyptic number.

It is an amenable number.

71233321 is a deficient number, since it is larger than the sum of its proper divisors (1).

71233321 is an equidigital number, since it uses as much as digits as its factorization.

71233321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 22.

The square root of 71233321 is about 8439.9834715478. The cubic root of 71233321 is about 414.5348657183.

Adding to 71233321 its reverse (12333217), we get a palindrome (83566538).

The spelling of 71233321 in words is "seventy-one million, two hundred thirty-three thousand, three hundred twenty-one".