65061381 has 16 divisors (see below), whose sum is σ = 108154368. Its totient is φ = 33798000.

The previous prime is 65061379. The next prime is 65061401. The reversal of 65061381 is 18316056.

It is not a de Polignac number, because 65061381 - 2¹ = 65061379 is a prime.

It is a super-2 number, since 2×65061381² = 8465966595254322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65061331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140595 + ... + 141056.

It is an arithmetic number, because the mean of its divisors is an integer number (6759648).

Almost surely, 2^65061381 is an apocalyptic number.

It is an amenable number.

65061381 is a deficient number, since it is larger than the sum of its proper divisors (43092987).

65061381 is a wasteful number, since it uses less digits than its factorization.

65061381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281672.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 65061381 is about 8066.0635380587. The cubic root of 65061381 is about 402.1990981786.

It can be divided in two parts, 6506 and 1381, that added together give a palindrome (7887).

The spelling of 65061381 in words is "sixty-five million, sixty-one thousand, three hundred eighty-one".