65222190 has 48 divisors (see below), whose sum is σ = 184996656. Its totient is φ = 15811200.

The previous prime is 65222153. The next prime is 65222191. The reversal of 65222190 is 9122256.

65222190 is a `hidden beast` number, since 652 + 2 + 2 + 1 + 9 + 0 = 666.

It is a super-2 number, since 2×65222190² = 8507868136792200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65222191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31951 + ... + 33930.

It is an arithmetic number, because the mean of its divisors is an integer number (3854097).

Almost surely, 2^65222190 is an apocalyptic number.

65222190 is an abundant number, since it is smaller than the sum of its proper divisors (119774466).

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

65222190 is a wasteful number, since it uses less digits than its factorization.

65222190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65905 (or 65902 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 65222190 is about 8076.0256314601. The cubic root of 65222190 is about 402.5301907578.

The spelling of 65222190 in words is "sixty-five million, two hundred twenty-two thousand, one hundred ninety".