65135220 has 24 divisors (see below), whose sum is σ = 182378784. Its totient is φ = 17369376.

The previous prime is 65135219. The next prime is 65135221. The reversal of 65135220 is 2253156.

It is an interprime number because it is at equal distance from previous prime (65135219) and next prime (65135221).

It is a super-3 number, since 3×65135220³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65135221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542734 + ... + 542853.

It is an arithmetic number, because the mean of its divisors is an integer number (7599116).

Almost surely, 2^65135220 is an apocalyptic number.

65135220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65135220 is an abundant number, since it is smaller than the sum of its proper divisors (117243564).

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

65135220 is a wasteful number, since it uses less digits than its factorization.

65135220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085599 (or 1085597 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 65135220 is about 8070.6393798757. The cubic root of 65135220 is about 402.3511943016.

Adding to 65135220 its reverse (2253156), we get a palindrome (67388376).

The spelling of 65135220 in words is "sixty-five million, one hundred thirty-five thousand, two hundred twenty".