65400331 has 2 divisors, whose sum is σ = 65400332. Its totient is φ = 65400330.

The previous prime is 65400317. The next prime is 65400341. The reversal of 65400331 is 13300456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65400331 - 2¹³ = 65392139 is a prime.

It is a super-2 number, since 2×65400331² = 8554406589819122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65400341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32700165 + 32700166.

It is an arithmetic number, because the mean of its divisors is an integer number (32700166).

Almost surely, 2^65400331 is an apocalyptic number.

65400331 is a deficient number, since it is larger than the sum of its proper divisors (1).

65400331 is an equidigital number, since it uses as much as digits as its factorization.

65400331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 65400331 is about 8087.0471125127. The cubic root of 65400331 is about 402.8963337589.

Adding to 65400331 its reverse (13300456), we get a palindrome (78700787).

The spelling of 65400331 in words is "sixty-five million, four hundred thousand, three hundred thirty-one".