65211283225 has 27 divisors (see below), whose sum is σ = 88900509439. Its totient is φ = 47416173200.

The previous prime is 65211283153. The next prime is 65211283243. The reversal of 65211283225 is 52238211256.

The square root of 65211283225 is 255365.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 23476061961 + 41735221264 = 153219^2 + 204292^2 .

It is not a de Polignac number, because 65211283225 - 2⁷ = 65211283097 is a prime.

It is a super-2 number, since 2×65211283225² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14042754 + ... + 14047396.

Almost surely, 2^65211283225 is an apocalyptic number.

65211283225 is the 255365-th square number.

65211283225 is the 127683-rd centered octagonal number.

It is an amenable number.

65211283225 is a deficient number, since it is larger than the sum of its proper divisors (23689226214).

65211283225 is an frugal number, since it uses more digits than its factorization.

65211283225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9318 (or 4659 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The spelling of 65211283225 in words is "sixty-five billion, two hundred eleven million, two hundred eighty-three thousand, two hundred twenty-five".