64071331 has 2 divisors, whose sum is σ = 64071332. Its totient is φ = 64071330.

The previous prime is 64071311. The next prime is 64071349. The reversal of 64071331 is 13317046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64071331 - 2⁵ = 64071299 is a prime.

It is a super-2 number, since 2×64071331² = 8210270912223122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64071296 and 64071305.

It is not a weakly prime, because it can be changed into another prime (64071311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32035665 + 32035666.

It is an arithmetic number, because the mean of its divisors is an integer number (32035666).

Almost surely, 2^64071331 is an apocalyptic number.

64071331 is a deficient number, since it is larger than the sum of its proper divisors (1).

64071331 is an equidigital number, since it uses as much as digits as its factorization.

64071331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 64071331 is about 8004.4569459770. The cubic root of 64071331 is about 400.1485510746.

Adding to 64071331 its reverse (13317046), we get a palindrome (77388377).

The spelling of 64071331 in words is "sixty-four million, seventy-one thousand, three hundred thirty-one".