65428331 has 2 divisors, whose sum is σ = 65428332. Its totient is φ = 65428330.

The previous prime is 65428309. The next prime is 65428369. The reversal of 65428331 is 13382456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65428331 - 2¹⁸ = 65166187 is a prime.

It is a super-2 number, since 2×65428331² = 8561732994891122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65427331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32714165 + 32714166.

It is an arithmetic number, because the mean of its divisors is an integer number (32714166).

Almost surely, 2^65428331 is an apocalyptic number.

65428331 is a deficient number, since it is larger than the sum of its proper divisors (1).

65428331 is an equidigital number, since it uses as much as digits as its factorization.

65428331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 65428331 is about 8088.7780906636. The cubic root of 65428331 is about 402.9538232121.

The spelling of 65428331 in words is "sixty-five million, four hundred twenty-eight thousand, three hundred thirty-one".