65220330 has 64 divisors (see below), whose sum is σ = 189423360. Its totient is φ = 14029824.

The previous prime is 65220319. The next prime is 65220377. The reversal of 65220330 is 3302256.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 65220297 and 65220306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5565 + ... + 12704.

It is an arithmetic number, because the mean of its divisors is an integer number (2959740).

Almost surely, 2^65220330 is an apocalyptic number.

65220330 is an abundant number, since it is smaller than the sum of its proper divisors (124203030).

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

65220330 is a wasteful number, since it uses less digits than its factorization.

65220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18303.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 65220330 is about 8075.9104749867. The cubic root of 65220330 is about 402.5263642826.

Adding to 65220330 its reverse (3302256), we get a palindrome (68522586).

The spelling of 65220330 in words is "sixty-five million, two hundred twenty thousand, three hundred thirty".