65217020 has 24 divisors (see below), whose sum is σ = 149406768. Its totient is φ = 23715200.

The previous prime is 65216999. The next prime is 65217023. The reversal of 65217020 is 2071256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65217023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148001 + ... + 148440.

It is an arithmetic number, because the mean of its divisors is an integer number (6225282).

Almost surely, 2^65217020 is an apocalyptic number.

It is an amenable number.

65217020 is an abundant number, since it is smaller than the sum of its proper divisors (84189748).

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

65217020 is a wasteful number, since it uses less digits than its factorization.

65217020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296461 (or 296459 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 65217020 is about 8075.7055419325. The cubic root of 65217020 is about 402.5195546227.

Adding to 65217020 its reverse (2071256), we get a palindrome (67288276).

The spelling of 65217020 in words is "sixty-five million, two hundred seventeen thousand, twenty".