65222010 has 80 divisors (see below), whose sum is σ = 200445696. Its totient is φ = 14906592.

The previous prime is 65221991. The next prime is 65222011. The reversal of 65222010 is 1022256.

65222010 is a `hidden beast` number, since 652 + 2 + 2 + 0 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65222011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 82 + ... + 11421.

Almost surely, 2^65222010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65222010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100222848).

65222010 is an abundant number, since it is smaller than the sum of its proper divisors (135223686).

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

65222010 is a wasteful number, since it uses less digits than its factorization.

65222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11529 (or 11520 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 65222010 is about 8076.0144873570. The cubic root of 65222010 is about 402.5298204569.

Adding to 65222010 its reverse (1022256), we get a palindrome (66244266).

The spelling of 65222010 in words is "sixty-five million, two hundred twenty-two thousand, ten".