65056381 has 18 divisors (see below), whose sum is σ = 72521070. Its totient is φ = 58331520.

The previous prime is 65056373. The next prime is 65056391. The reversal of 65056381 is 18365056.

It can be written as a sum of positive squares in 9 ways, for example, as 50993881 + 14062500 = 7141^2 + 3750^2 .

It is not a de Polignac number, because 65056381 - 2³ = 65056373 is a prime.

It is a super-2 number, since 2×65056381² = 8464665417634322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65056301) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 283975 + ... + 284203.

Almost surely, 2^65056381 is an apocalyptic number.

It is an amenable number.

65056381 is a deficient number, since it is larger than the sum of its proper divisors (7464689).

65056381 is a wasteful number, since it uses less digits than its factorization.

65056381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 65056381 is about 8065.7535915747. The cubic root of 65056381 is about 402.1887948467.

The spelling of 65056381 in words is "sixty-five million, fifty-six thousand, three hundred eighty-one".