78220195 has 4 divisors (see below), whose sum is σ = 93864240. Its totient is φ = 62576152.

The previous prime is 78220193. The next prime is 78220199. The reversal of 78220195 is 59102287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59102287 = 6029 ⋅9803.

It is a cyclic number.

It is not a de Polignac number, because 78220195 - 2¹ = 78220193 is a prime.

It is a super-2 number, since 2×78220195² = 12236797811676050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78220195.

It is not an unprimeable number, because it can be changed into a prime (78220193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7822015 + ... + 7822024.

It is an arithmetic number, because the mean of its divisors is an integer number (23466060).

Almost surely, 2^78220195 is an apocalyptic number.

78220195 is a deficient number, since it is larger than the sum of its proper divisors (15644045).

78220195 is a wasteful number, since it uses less digits than its factorization.

78220195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15644044.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 78220195 is about 8844.2181678201. The cubic root of 78220195 is about 427.6675494307.

The spelling of 78220195 in words is "seventy-eight million, two hundred twenty thousand, one hundred ninety-five".