64072331 has 2 divisors, whose sum is σ = 64072332. Its totient is φ = 64072330.

The previous prime is 64072321. The next prime is 64072343. The reversal of 64072331 is 13327046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64072331 - 2¹⁴ = 64055947 is a prime.

It is a super-2 number, since 2×64072331² = 8210527199547122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64072331.

It is not a weakly prime, because it can be changed into another prime (64072321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32036165 + 32036166.

It is an arithmetic number, because the mean of its divisors is an integer number (32036166).

Almost surely, 2^64072331 is an apocalyptic number.

64072331 is a deficient number, since it is larger than the sum of its proper divisors (1).

64072331 is an equidigital number, since it uses as much as digits as its factorization.

64072331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 64072331 is about 8004.5194109328. The cubic root of 64072331 is about 400.1506328506.

Adding to 64072331 its reverse (13327046), we get a palindrome (77399377).

The spelling of 64072331 in words is "sixty-four million, seventy-two thousand, three hundred thirty-one".