65220194 has 16 divisors (see below), whose sum is σ = 111553848. Its totient is φ = 28330752.

The previous prime is 65220173. The next prime is 65220227. The reversal of 65220194 is 49102256.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42055225 + 23164969 = 6485^2 + 4813^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73337 + ... + 74220.

Almost surely, 2^65220194 is an apocalyptic number.

65220194 is a deficient number, since it is larger than the sum of its proper divisors (46333654).

65220194 is a wasteful number, since it uses less digits than its factorization.

65220194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147589.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 65220194 is about 8075.9020548791. The cubic root of 65220194 is about 402.5260844945.

The spelling of 65220194 in words is "sixty-five million, two hundred twenty thousand, one hundred ninety-four".