65158381 has 2 divisors, whose sum is σ = 65158382. Its totient is φ = 65158380.

The previous prime is 65158367. The next prime is 65158393. The reversal of 65158381 is 18385156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55800900 + 9357481 = 7470^2 + 3059^2 .

It is a cyclic number.

It is not a de Polignac number, because 65158381 - 2¹⁹ = 64634093 is a prime.

It is a super-2 number, since 2×65158381² = 8491229229082322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65158381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65158321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32579190 + 32579191.

It is an arithmetic number, because the mean of its divisors is an integer number (32579191).

Almost surely, 2^65158381 is an apocalyptic number.

It is an amenable number.

65158381 is a deficient number, since it is larger than the sum of its proper divisors (1).

65158381 is an equidigital number, since it uses as much as digits as its factorization.

65158381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The square root of 65158381 is about 8072.0741448527. The cubic root of 65158381 is about 402.3988784459.

The spelling of 65158381 in words is "sixty-five million, one hundred fifty-eight thousand, three hundred eighty-one".