65181340 has 24 divisors (see below), whose sum is σ = 156435552. Its totient is φ = 22347840.

The previous prime is 65181331. The next prime is 65181407. The reversal of 65181340 is 4318156.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 65181299 and 65181308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232651 + ... + 232930.

It is an arithmetic number, because the mean of its divisors is an integer number (6518148).

Almost surely, 2^65181340 is an apocalyptic number.

It is an amenable number.

65181340 is an abundant number, since it is smaller than the sum of its proper divisors (91254212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65181340 is a wasteful number, since it uses less digits than its factorization.

65181340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465597 (or 465595 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 65181340 is about 8073.4961447938. The cubic root of 65181340 is about 402.4461355591.

Adding to 65181340 its reverse (4318156), we get a palindrome (69499496).

The spelling of 65181340 in words is "sixty-five million, one hundred eighty-one thousand, three hundred forty".