195218 has 4 divisors (see below), whose sum is σ = 292830. Its totient is φ = 97608.

The previous prime is 195203. The next prime is 195229. The reversal of 195218 is 812591.

195218 = 122² + 123² + ... + 133².

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812591 = 13 ⋅62507.

It can be written as a sum of positive squares in only one way, i.e., 170569 + 24649 = 413^2 + 157^2 .

It is a super-2 number, since 2×195218² = 76220135048, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48803 + ... + 48806.

2¹⁹⁵²¹⁸ is an apocalyptic number.

195218 is a deficient number, since it is larger than the sum of its proper divisors (97612).

195218 is an equidigital number, since it uses as much as digits as its factorization.

195218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97611.

The product of its digits is 720, while the sum is 26.

The square root of 195218 is about 441.8348107608. The cubic root of 195218 is about 58.0105014675.

The spelling of 195218 in words is "one hundred ninety-five thousand, two hundred eighteen".