65212818 has 32 divisors (see below), whose sum is σ = 144702720. Its totient is φ = 19425360.

The previous prime is 65212817. The next prime is 65212859. The reversal of 65212818 is 81821256.

It is a super-2 number, since 2×65212818² = 8505423263002248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65212817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4480 + ... + 12267.

It is an arithmetic number, because the mean of its divisors is an integer number (4521960).

Almost surely, 2^65212818 is an apocalyptic number.

65212818 is an abundant number, since it is smaller than the sum of its proper divisors (79489902).

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

65212818 is a wasteful number, since it uses less digits than its factorization.

65212818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16822.

The product of its digits is 7680, while the sum is 33.

The square root of 65212818 is about 8075.4453747146. The cubic root of 65212818 is about 402.5109095200.

It can be divided in two parts, 6521 and 2818, that added together give a palindrome (9339).

The spelling of 65212818 in words is "sixty-five million, two hundred twelve thousand, eight hundred eighteen".