65981222 has 4 divisors (see below), whose sum is σ = 98971836. Its totient is φ = 32990610.

The previous prime is 65981207. The next prime is 65981257. The reversal of 65981222 is 22218956.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×65981222² = 8707043313226568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16495304 + ... + 16495307.

It is an arithmetic number, because the mean of its divisors is an integer number (24742959).

Almost surely, 2^65981222 is an apocalyptic number.

65981222 is a deficient number, since it is larger than the sum of its proper divisors (32990614).

65981222 is a wasteful number, since it uses less digits than its factorization.

65981222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32990613.

The product of its digits is 17280, while the sum is 35.

The square root of 65981222 is about 8122.8826164115. The cubic root of 65981222 is about 404.0856719596.

The spelling of 65981222 in words is "sixty-five million, nine hundred eighty-one thousand, two hundred twenty-two".