65211340 has 48 divisors (see below), whose sum is σ = 140112000. Its totient is φ = 25489152.

The previous prime is 65211323. The next prime is 65211403. The reversal of 65211340 is 4311256.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235282 + ... + 235558.

It is an arithmetic number, because the mean of its divisors is an integer number (2919000).

Almost surely, 2^65211340 is an apocalyptic number.

It is an amenable number.

65211340 is an abundant number, since it is smaller than the sum of its proper divisors (74900660).

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

65211340 is a wasteful number, since it uses less digits than its factorization.

65211340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 65211340 is about 8075.3538622156. The cubic root of 65211340 is about 402.5078686270.

Adding to 65211340 its reverse (4311256), we get a palindrome (69522596).

The spelling of 65211340 in words is "sixty-five million, two hundred eleven thousand, three hundred forty".