65147220 has 96 divisors (see below), whose sum is σ = 203965440. Its totient is φ = 17262720.

The previous prime is 65147189. The next prime is 65147231. The reversal of 65147220 is 2274156.

65147220 is a `hidden beast` number, since 651 + 4 + 7 + 2 + 2 + 0 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120150 + ... + 120690.

It is an arithmetic number, because the mean of its divisors is an integer number (2124640).

Almost surely, 2^65147220 is an apocalyptic number.

65147220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65147220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101982720).

65147220 is an abundant number, since it is smaller than the sum of its proper divisors (138818220).

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

65147220 is a wasteful number, since it uses less digits than its factorization.

65147220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 65147220 is about 8071.3827811596. The cubic root of 65147220 is about 402.3759014562.

The spelling of 65147220 in words is "sixty-five million, one hundred forty-seven thousand, two hundred twenty".