65222512 has 20 divisors (see below), whose sum is σ = 130446016. Its totient is φ = 31559040.

The previous prime is 65222483. The next prime is 65222519. The reversal of 65222512 is 21522256.

It is a happy number.

65222512 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65222519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65253 + ... + 66244.

Almost surely, 2^65222512 is an apocalyptic number.

65222512 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

65222512 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65222512 is a wasteful number, since it uses less digits than its factorization.

65222512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131536 (or 131530 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 65222512 is about 8076.0455669839. The cubic root of 65222512 is about 402.5308531832.

Adding to 65222512 its reverse (21522256), we get a palindrome (86744768).

The spelling of 65222512 in words is "sixty-five million, two hundred twenty-two thousand, five hundred twelve".