65500381 has 2 divisors, whose sum is σ = 65500382. Its totient is φ = 65500380.

The previous prime is 65500373. The next prime is 65500399. The reversal of 65500381 is 18300556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65464281 + 36100 = 8091^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 65500381 - 2³ = 65500373 is a prime.

It is a super-2 number, since 2×65500381² = 8580599822290322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65500321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32750190 + 32750191.

It is an arithmetic number, because the mean of its divisors is an integer number (32750191).

Almost surely, 2^65500381 is an apocalyptic number.

It is an amenable number.

65500381 is a deficient number, since it is larger than the sum of its proper divisors (1).

65500381 is an equidigital number, since it uses as much as digits as its factorization.

65500381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 65500381 is about 8093.2305663437. The cubic root of 65500381 is about 403.1016805292.

The spelling of 65500381 in words is "sixty-five million, five hundred thousand, three hundred eighty-one".